./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a --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 fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- 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-b5237d8 [2022-11-21 13:52:32,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:52:32,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:52:32,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:52:32,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:52:32,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:52:32,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:52:32,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:52:32,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:52:32,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:52:32,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:52:32,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:52:32,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:52:32,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:52:32,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:52:32,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:52:32,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:52:32,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:52:32,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:52:32,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:52:32,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:52:32,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:52:32,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:52:32,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:52:32,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:52:32,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:52:32,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:52:32,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:52:32,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:52:32,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:52:32,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:52:32,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:52:32,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:52:32,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:52:32,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:52:32,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:52:32,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:52:32,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:52:32,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:52:32,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:52:32,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:52:32,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 13:52:32,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:52:32,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:52:32,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:52:32,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:52:32,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:52:32,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:52:32,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:52:32,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:52:32,880 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:52:32,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:52:32,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:52:32,882 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:52:32,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:52:32,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:52:32,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:52:32,883 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 13:52:32,883 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 13:52:32,883 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 13:52:32,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:52:32,883 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 13:52:32,884 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:52:32,884 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:52:32,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:52:32,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:52:32,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:52:32,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:52:32,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:52:32,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:52:32,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:52:32,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:52:32,886 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_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2022-11-21 13:52:33,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:52:33,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:52:33,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:52:33,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:52:33,210 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:52:33,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-11-21 13:52:36,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:52:36,621 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:52:36,621 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-11-21 13:52:36,635 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/data/2550effaf/b975e29ede84498d95307cdc81289336/FLAG35a5dfbd3 [2022-11-21 13:52:36,650 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/data/2550effaf/b975e29ede84498d95307cdc81289336 [2022-11-21 13:52:36,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:52:36,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:52:36,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:52:36,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:52:36,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:52:36,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:36" (1/1) ... [2022-11-21 13:52:36,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5137b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:36, skipping insertion in model container [2022-11-21 13:52:36,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:36" (1/1) ... [2022-11-21 13:52:36,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:52:36,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:52:37,064 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_f52bfc38-5998-47c3-84ba-d4e1e8f19909/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2022-11-21 13:52:37,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:52:37,081 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:52:37,139 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_f52bfc38-5998-47c3-84ba-d4e1e8f19909/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2022-11-21 13:52:37,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:52:37,187 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:52:37,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37 WrapperNode [2022-11-21 13:52:37,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:52:37,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:52:37,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:52:37,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:52:37,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,239 INFO L138 Inliner]: procedures = 129, calls = 39, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 185 [2022-11-21 13:52:37,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:52:37,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:52:37,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:52:37,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:52:37,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:52:37,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:52:37,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:52:37,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:52:37,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (1/1) ... [2022-11-21 13:52:37,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:52:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:37,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:52:37,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:52:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-21 13:52:37,399 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-21 13:52:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 13:52:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:52:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:52:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 13:52:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 13:52:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:52:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 13:52:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:52:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:52:37,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:52:37,599 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:52:37,601 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:52:37,635 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-21 13:52:38,075 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:52:38,082 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:52:38,092 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-21 13:52:38,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:38 BoogieIcfgContainer [2022-11-21 13:52:38,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:52:38,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:52:38,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:52:38,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:52:38,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:52:36" (1/3) ... [2022-11-21 13:52:38,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67aedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:38, skipping insertion in model container [2022-11-21 13:52:38,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:37" (2/3) ... [2022-11-21 13:52:38,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67aedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:38, skipping insertion in model container [2022-11-21 13:52:38,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:38" (3/3) ... [2022-11-21 13:52:38,107 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2022-11-21 13:52:38,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:52:38,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-21 13:52:38,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:52:38,202 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;@19971ad8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:52:38,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-21 13:52:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 115 states have internal predecessors, (140), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 13:52:38,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:38,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 13:52:38,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1083078, now seen corresponding path program 1 times [2022-11-21 13:52:38,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:38,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507571202] [2022-11-21 13:52:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:38,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507571202] [2022-11-21 13:52:38,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507571202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:38,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:38,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:38,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104637011] [2022-11-21 13:52:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:38,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:52:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:52:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:52:38,479 INFO L87 Difference]: Start difference. First operand has 117 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 115 states have internal predecessors, (140), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:38,527 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2022-11-21 13:52:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:52:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-21 13:52:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:38,538 INFO L225 Difference]: With dead ends: 117 [2022-11-21 13:52:38,540 INFO L226 Difference]: Without dead ends: 111 [2022-11-21 13:52:38,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:52:38,546 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:38,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:52:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-21 13:52:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-21 13:52:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2022-11-21 13:52:38,598 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 4 [2022-11-21 13:52:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:38,599 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2022-11-21 13:52:38,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2022-11-21 13:52:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 13:52:38,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:38,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 13:52:38,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:52:38,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1079730, now seen corresponding path program 1 times [2022-11-21 13:52:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856247727] [2022-11-21 13:52:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:38,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856247727] [2022-11-21 13:52:38,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856247727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:38,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:38,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275985531] [2022-11-21 13:52:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:38,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:38,763 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:38,861 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2022-11-21 13:52:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-21 13:52:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:38,863 INFO L225 Difference]: With dead ends: 136 [2022-11-21 13:52:38,863 INFO L226 Difference]: Without dead ends: 136 [2022-11-21 13:52:38,863 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 [2022-11-21 13:52:38,865 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 113 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:38,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 99 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-21 13:52:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2022-11-21 13:52:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.7681159420289856) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-11-21 13:52:38,876 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 4 [2022-11-21 13:52:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:38,878 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-11-21 13:52:38,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-11-21 13:52:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 13:52:38,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:38,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 13:52:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:52:38,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1079731, now seen corresponding path program 1 times [2022-11-21 13:52:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:38,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969555470] [2022-11-21 13:52:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:38,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969555470] [2022-11-21 13:52:38,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969555470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:38,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:38,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:52:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561381546] [2022-11-21 13:52:38,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:38,999 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:39,055 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2022-11-21 13:52:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-21 13:52:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:39,057 INFO L225 Difference]: With dead ends: 157 [2022-11-21 13:52:39,057 INFO L226 Difference]: Without dead ends: 157 [2022-11-21 13:52:39,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:39,059 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 52 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:39,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 226 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:52:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-21 13:52:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2022-11-21 13:52:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.7571428571428571) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2022-11-21 13:52:39,073 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 4 [2022-11-21 13:52:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2022-11-21 13:52:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2022-11-21 13:52:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:52:39,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:39,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:52:39,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -336207078, now seen corresponding path program 1 times [2022-11-21 13:52:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299682020] [2022-11-21 13:52:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:39,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299682020] [2022-11-21 13:52:39,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299682020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:39,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406129208] [2022-11-21 13:52:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:39,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:39,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:39,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:39,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:52:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:52:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:39,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:39,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406129208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:39,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:52:39,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-21 13:52:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936068964] [2022-11-21 13:52:39,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:39,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:52:39,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:52:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:39,426 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:39,557 INFO L93 Difference]: Finished difference Result 244 states and 268 transitions. [2022-11-21 13:52:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-21 13:52:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:39,562 INFO L225 Difference]: With dead ends: 244 [2022-11-21 13:52:39,562 INFO L226 Difference]: Without dead ends: 244 [2022-11-21 13:52:39,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:39,563 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 319 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:39,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 603 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-21 13:52:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 173. [2022-11-21 13:52:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 172 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2022-11-21 13:52:39,585 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 9 [2022-11-21 13:52:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:39,589 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2022-11-21 13:52:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2022-11-21 13:52:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 13:52:39,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:39,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:39,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:52:39,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:39,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash -991177183, now seen corresponding path program 1 times [2022-11-21 13:52:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845588371] [2022-11-21 13:52:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:39,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845588371] [2022-11-21 13:52:39,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845588371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:39,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:39,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:39,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177868890] [2022-11-21 13:52:39,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:39,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:39,931 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:40,061 INFO L93 Difference]: Finished difference Result 329 states and 444 transitions. [2022-11-21 13:52:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 13:52:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:40,066 INFO L225 Difference]: With dead ends: 329 [2022-11-21 13:52:40,066 INFO L226 Difference]: Without dead ends: 329 [2022-11-21 13:52:40,072 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 [2022-11-21 13:52:40,077 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:40,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 270 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-21 13:52:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 172. [2022-11-21 13:52:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 133 states have (on average 1.7293233082706767) internal successors, (230), 171 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2022-11-21 13:52:40,100 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 11 [2022-11-21 13:52:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:40,100 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2022-11-21 13:52:40,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2022-11-21 13:52:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 13:52:40,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:40,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:40,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:52:40,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash -991177182, now seen corresponding path program 1 times [2022-11-21 13:52:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203958330] [2022-11-21 13:52:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:40,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203958330] [2022-11-21 13:52:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203958330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:40,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:40,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807842592] [2022-11-21 13:52:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:40,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:40,270 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:40,403 INFO L93 Difference]: Finished difference Result 330 states and 442 transitions. [2022-11-21 13:52:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 13:52:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:40,406 INFO L225 Difference]: With dead ends: 330 [2022-11-21 13:52:40,406 INFO L226 Difference]: Without dead ends: 330 [2022-11-21 13:52:40,408 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 [2022-11-21 13:52:40,413 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 114 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:40,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 278 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-21 13:52:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 171. [2022-11-21 13:52:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 133 states have (on average 1.7067669172932332) internal successors, (227), 170 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2022-11-21 13:52:40,440 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 11 [2022-11-21 13:52:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:40,441 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2022-11-21 13:52:40,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2022-11-21 13:52:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:52:40,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:40,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:52:40,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash -661772220, now seen corresponding path program 1 times [2022-11-21 13:52:40,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:40,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496273890] [2022-11-21 13:52:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:40,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496273890] [2022-11-21 13:52:40,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496273890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:40,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:40,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:40,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118007882] [2022-11-21 13:52:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:40,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:40,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:40,514 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:40,620 INFO L93 Difference]: Finished difference Result 244 states and 312 transitions. [2022-11-21 13:52:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 13:52:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:40,622 INFO L225 Difference]: With dead ends: 244 [2022-11-21 13:52:40,622 INFO L226 Difference]: Without dead ends: 244 [2022-11-21 13:52:40,623 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 [2022-11-21 13:52:40,623 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 105 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:40,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 204 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-21 13:52:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-11-21 13:52:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.6616541353383458) internal successors, (221), 168 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-11-21 13:52:40,630 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 12 [2022-11-21 13:52:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:40,631 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-11-21 13:52:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-11-21 13:52:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:52:40,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:40,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:52:40,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash -661772219, now seen corresponding path program 1 times [2022-11-21 13:52:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303599600] [2022-11-21 13:52:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303599600] [2022-11-21 13:52:40,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303599600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:40,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:40,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:52:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131023430] [2022-11-21 13:52:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:40,716 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:40,821 INFO L93 Difference]: Finished difference Result 376 states and 459 transitions. [2022-11-21 13:52:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 13:52:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:40,823 INFO L225 Difference]: With dead ends: 376 [2022-11-21 13:52:40,823 INFO L226 Difference]: Without dead ends: 376 [2022-11-21 13:52:40,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:40,824 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 234 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:40,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 812 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-21 13:52:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 172. [2022-11-21 13:52:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 136 states have (on average 1.6470588235294117) internal successors, (224), 171 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 224 transitions. [2022-11-21 13:52:40,831 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 224 transitions. Word has length 12 [2022-11-21 13:52:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:40,832 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 224 transitions. [2022-11-21 13:52:40,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 224 transitions. [2022-11-21 13:52:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 13:52:40,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:40,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:40,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:52:40,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash -51661170, now seen corresponding path program 1 times [2022-11-21 13:52:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:40,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693735254] [2022-11-21 13:52:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:40,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:40,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693735254] [2022-11-21 13:52:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693735254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017317169] [2022-11-21 13:52:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:40,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:40,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:40,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:52:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:52:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:41,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017317169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:41,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:52:41,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-11-21 13:52:41,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268634193] [2022-11-21 13:52:41,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:52:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:52:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:52:41,170 INFO L87 Difference]: Start difference. First operand 172 states and 224 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:41,303 INFO L93 Difference]: Finished difference Result 391 states and 474 transitions. [2022-11-21 13:52:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:52:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-21 13:52:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:41,305 INFO L225 Difference]: With dead ends: 391 [2022-11-21 13:52:41,306 INFO L226 Difference]: Without dead ends: 391 [2022-11-21 13:52:41,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:52:41,307 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 491 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:41,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 814 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-21 13:52:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 196. [2022-11-21 13:52:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.55) internal successors, (248), 195 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 248 transitions. [2022-11-21 13:52:41,313 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 248 transitions. Word has length 16 [2022-11-21 13:52:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:41,314 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 248 transitions. [2022-11-21 13:52:41,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 248 transitions. [2022-11-21 13:52:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:52:41,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:41,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-21 13:52:41,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 13:52:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 13:52:41,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1254577850, now seen corresponding path program 2 times [2022-11-21 13:52:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:41,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185739814] [2022-11-21 13:52:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 13:52:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185739814] [2022-11-21 13:52:41,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185739814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:41,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:41,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832478191] [2022-11-21 13:52:41,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:41,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:41,588 INFO L87 Difference]: Start difference. First operand 196 states and 248 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:41,680 INFO L93 Difference]: Finished difference Result 269 states and 337 transitions. [2022-11-21 13:52:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-21 13:52:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:41,682 INFO L225 Difference]: With dead ends: 269 [2022-11-21 13:52:41,682 INFO L226 Difference]: Without dead ends: 269 [2022-11-21 13:52:41,682 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 [2022-11-21 13:52:41,684 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 63 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:41,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 182 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-21 13:52:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 233. [2022-11-21 13:52:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.5532994923857868) internal successors, (306), 232 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 306 transitions. [2022-11-21 13:52:41,690 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 306 transitions. Word has length 19 [2022-11-21 13:52:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:41,691 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 306 transitions. [2022-11-21 13:52:41,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 306 transitions. [2022-11-21 13:52:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 13:52:41,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:41,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 13:52:41,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1435011604, now seen corresponding path program 1 times [2022-11-21 13:52:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:41,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871245545] [2022-11-21 13:52:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 13:52:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:41,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871245545] [2022-11-21 13:52:41,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871245545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:41,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:41,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:52:41,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607212717] [2022-11-21 13:52:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:41,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:41,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:41,828 INFO L87 Difference]: Start difference. First operand 233 states and 306 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:41,919 INFO L93 Difference]: Finished difference Result 260 states and 321 transitions. [2022-11-21 13:52:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 13:52:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:41,921 INFO L225 Difference]: With dead ends: 260 [2022-11-21 13:52:41,921 INFO L226 Difference]: Without dead ends: 260 [2022-11-21 13:52:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:41,922 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 105 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 380 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-21 13:52:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 217. [2022-11-21 13:52:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 181 states have (on average 1.5248618784530388) internal successors, (276), 216 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 276 transitions. [2022-11-21 13:52:41,928 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 276 transitions. Word has length 23 [2022-11-21 13:52:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:41,928 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 276 transitions. [2022-11-21 13:52:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 276 transitions. [2022-11-21 13:52:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 13:52:41,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:41,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 13:52:41,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 877276576, now seen corresponding path program 2 times [2022-11-21 13:52:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:41,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797907677] [2022-11-21 13:52:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:52:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:42,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797907677] [2022-11-21 13:52:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797907677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486996372] [2022-11-21 13:52:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:52:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:42,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:42,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:52:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:52:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:52:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:52:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:42,453 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 [2022-11-21 13:52:42,463 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 [2022-11-21 13:52:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:42,542 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 [2022-11-21 13:52:42,565 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 13:52:42,566 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 [2022-11-21 13:52:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:42,634 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 [2022-11-21 13:52:42,646 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 13:52:42,646 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 [2022-11-21 13:52:42,702 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 13:52:42,703 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 18 [2022-11-21 13:52:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:52:42,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486996372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:43,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:52:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 9 [2022-11-21 13:52:43,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442221482] [2022-11-21 13:52:43,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:43,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:52:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:43,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:52:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:52:43,424 INFO L87 Difference]: Start difference. First operand 217 states and 276 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:43,638 INFO L93 Difference]: Finished difference Result 272 states and 330 transitions. [2022-11-21 13:52:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:52:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-21 13:52:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:43,640 INFO L225 Difference]: With dead ends: 272 [2022-11-21 13:52:43,640 INFO L226 Difference]: Without dead ends: 272 [2022-11-21 13:52:43,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:52:43,641 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 486 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:43,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 262 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:52:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-21 13:52:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2022-11-21 13:52:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 181 states have (on average 1.4917127071823204) internal successors, (270), 214 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 270 transitions. [2022-11-21 13:52:43,646 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 270 transitions. Word has length 24 [2022-11-21 13:52:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:43,647 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 270 transitions. [2022-11-21 13:52:43,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 270 transitions. [2022-11-21 13:52:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 13:52:43,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:43,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:43,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:52:43,848 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash 361607171, now seen corresponding path program 1 times [2022-11-21 13:52:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610567286] [2022-11-21 13:52:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 13:52:43,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610567286] [2022-11-21 13:52:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610567286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:43,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:52:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28911847] [2022-11-21 13:52:43,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:43,980 INFO L87 Difference]: Start difference. First operand 215 states and 270 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:44,077 INFO L93 Difference]: Finished difference Result 233 states and 288 transitions. [2022-11-21 13:52:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-21 13:52:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:44,078 INFO L225 Difference]: With dead ends: 233 [2022-11-21 13:52:44,079 INFO L226 Difference]: Without dead ends: 233 [2022-11-21 13:52:44,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:44,080 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 15 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:44,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 407 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-21 13:52:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2022-11-21 13:52:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.4863387978142077) internal successors, (272), 216 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2022-11-21 13:52:44,087 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 25 [2022-11-21 13:52:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:44,087 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2022-11-21 13:52:44,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2022-11-21 13:52:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 13:52:44,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:44,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 13:52:44,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1675080075, now seen corresponding path program 1 times [2022-11-21 13:52:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458580195] [2022-11-21 13:52:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:44,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 13:52:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458580195] [2022-11-21 13:52:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458580195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:44,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:44,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:52:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978508081] [2022-11-21 13:52:44,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:44,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:52:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:52:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:44,205 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:44,293 INFO L93 Difference]: Finished difference Result 219 states and 273 transitions. [2022-11-21 13:52:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:52:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 13:52:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:44,295 INFO L225 Difference]: With dead ends: 219 [2022-11-21 13:52:44,295 INFO L226 Difference]: Without dead ends: 211 [2022-11-21 13:52:44,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:44,296 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:44,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 264 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-21 13:52:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-21 13:52:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.502857142857143) internal successors, (263), 208 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 263 transitions. [2022-11-21 13:52:44,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 263 transitions. Word has length 26 [2022-11-21 13:52:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:44,302 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 263 transitions. [2022-11-21 13:52:44,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 263 transitions. [2022-11-21 13:52:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 13:52:44,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:44,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 13:52:44,306 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash -981051253, now seen corresponding path program 1 times [2022-11-21 13:52:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339399462] [2022-11-21 13:52:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 13:52:44,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:44,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339399462] [2022-11-21 13:52:44,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339399462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:44,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:44,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:52:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313452415] [2022-11-21 13:52:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:44,445 INFO L87 Difference]: Start difference. First operand 209 states and 263 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:44,555 INFO L93 Difference]: Finished difference Result 235 states and 289 transitions. [2022-11-21 13:52:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:52:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 13:52:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:44,557 INFO L225 Difference]: With dead ends: 235 [2022-11-21 13:52:44,557 INFO L226 Difference]: Without dead ends: 235 [2022-11-21 13:52:44,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:44,558 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 293 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:44,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 169 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-21 13:52:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-11-21 13:52:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 1.4857142857142858) internal successors, (260), 207 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-11-21 13:52:44,566 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 29 [2022-11-21 13:52:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:44,566 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-11-21 13:52:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-11-21 13:52:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 13:52:44,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:44,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 13:52:44,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -981051252, now seen corresponding path program 1 times [2022-11-21 13:52:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:44,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869468922] [2022-11-21 13:52:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 13:52:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869468922] [2022-11-21 13:52:44,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869468922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:44,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:44,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:52:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962258680] [2022-11-21 13:52:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:52:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:52:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:52:44,792 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:44,890 INFO L93 Difference]: Finished difference Result 207 states and 257 transitions. [2022-11-21 13:52:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:52:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 13:52:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:44,891 INFO L225 Difference]: With dead ends: 207 [2022-11-21 13:52:44,891 INFO L226 Difference]: Without dead ends: 207 [2022-11-21 13:52:44,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:52:44,892 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 305 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:44,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 126 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-21 13:52:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-11-21 13:52:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 175 states have (on average 1.4685714285714286) internal successors, (257), 206 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2022-11-21 13:52:44,898 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 29 [2022-11-21 13:52:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:44,899 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2022-11-21 13:52:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2022-11-21 13:52:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 13:52:44,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:44,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 13:52:44,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash -347817722, now seen corresponding path program 1 times [2022-11-21 13:52:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:44,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729396943] [2022-11-21 13:52:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729396943] [2022-11-21 13:52:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729396943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152771614] [2022-11-21 13:52:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:45,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:45,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:52:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 13:52:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:45,568 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 [2022-11-21 13:52:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:45,618 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 [2022-11-21 13:52:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:45,674 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 [2022-11-21 13:52:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:45,708 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 [2022-11-21 13:52:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:45,745 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 [2022-11-21 13:52:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:52:45,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:52:52,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152771614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:52,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:52:52,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-11-21 13:52:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784038162] [2022-11-21 13:52:52,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:52,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:52:52,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:52:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:52:52,588 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:52,763 INFO L93 Difference]: Finished difference Result 230 states and 278 transitions. [2022-11-21 13:52:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 13:52:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:52,765 INFO L225 Difference]: With dead ends: 230 [2022-11-21 13:52:52,765 INFO L226 Difference]: Without dead ends: 230 [2022-11-21 13:52:52,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:52:52,766 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 779 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:52,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 86 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-21 13:52:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 203. [2022-11-21 13:52:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 175 states have (on average 1.4228571428571428) internal successors, (249), 202 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 249 transitions. [2022-11-21 13:52:52,772 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 249 transitions. Word has length 30 [2022-11-21 13:52:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:52,773 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 249 transitions. [2022-11-21 13:52:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 249 transitions. [2022-11-21 13:52:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 13:52:52,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:52,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:52,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:52,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:52:52,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash -347817723, now seen corresponding path program 1 times [2022-11-21 13:52:52,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:52,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301942928] [2022-11-21 13:52:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:52:53,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301942928] [2022-11-21 13:52:53,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301942928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273975095] [2022-11-21 13:52:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:53,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:53,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:53,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:52:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 13:52:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:53,480 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 [2022-11-21 13:52:53,513 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 13:52:53,513 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 18 [2022-11-21 13:52:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:53,556 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 [2022-11-21 13:52:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:53,594 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 [2022-11-21 13:52:53,623 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 13:52:53,623 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 22 [2022-11-21 13:52:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:53,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:54,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273975095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:54,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:52:54,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-11-21 13:52:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240126301] [2022-11-21 13:52:54,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:54,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:52:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:52:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:52:54,179 INFO L87 Difference]: Start difference. First operand 203 states and 249 transitions. Second operand has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:54,362 INFO L93 Difference]: Finished difference Result 228 states and 272 transitions. [2022-11-21 13:52:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:52:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 13:52:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:54,363 INFO L225 Difference]: With dead ends: 228 [2022-11-21 13:52:54,363 INFO L226 Difference]: Without dead ends: 228 [2022-11-21 13:52:54,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:52:54,364 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 684 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:54,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 225 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-21 13:52:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2022-11-21 13:52:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 175 states have (on average 1.3885714285714286) internal successors, (243), 200 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 243 transitions. [2022-11-21 13:52:54,372 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 243 transitions. Word has length 30 [2022-11-21 13:52:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:54,373 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 243 transitions. [2022-11-21 13:52:54,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 243 transitions. [2022-11-21 13:52:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 13:52:54,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:54,373 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 13:52:54,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:52:54,574 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:52:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1918350099, now seen corresponding path program 1 times [2022-11-21 13:52:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280590537] [2022-11-21 13:52:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:52:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280590537] [2022-11-21 13:52:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280590537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:52:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493069458] [2022-11-21 13:52:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:55,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:55,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:55,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:52:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 13:52:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:55,639 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 [2022-11-21 13:52:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:55,647 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 [2022-11-21 13:52:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:55,838 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 [2022-11-21 13:52:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:55,849 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 19 treesize of output 18 [2022-11-21 13:52:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,051 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 13:52:56,051 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 21 treesize of output 30 [2022-11-21 13:52:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,062 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 [2022-11-21 13:52:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,194 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 14 treesize of output 16 [2022-11-21 13:52:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,202 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 [2022-11-21 13:52:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,225 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 [2022-11-21 13:52:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,234 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 [2022-11-21 13:52:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,319 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 [2022-11-21 13:52:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:56,326 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 [2022-11-21 13:52:56,362 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 [2022-11-21 13:52:56,367 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 [2022-11-21 13:52:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:56,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:56,399 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~new_last~0#1.base| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)) (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~new_last~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) is different from false [2022-11-21 13:52:56,418 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int)) (or (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)) (not (<= |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base|)))) (forall ((|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int)) (or (not (<= |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base|)) (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))))) is different from false [2022-11-21 13:52:58,836 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))) is different from false [2022-11-21 13:52:58,897 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int)) (or (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))))) is different from false [2022-11-21 13:53:06,535 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_492 (Array Int Int)) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int) (v_ArrVal_495 (Array Int Int))) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_497 (Array Int Int))) (or (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_492) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0) (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|))))))) (forall ((v_ArrVal_493 (Array Int Int)) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| Int) (|ULTIMATE.start_sll_create_~head~0#1.offset| Int)) (or (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_493))) (store .cse0 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| (store (select .cse0 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25|) 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))))) (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|))))) is different from false [2022-11-21 13:53:12,636 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| Int)) (or (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| Int) (|ULTIMATE.start_sll_create_~head~0#1.offset| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_498 (Array Int Int))) (or (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|) (= (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25|) 0 |ULTIMATE.start_sll_create_~head~0#1.offset|)) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_498) |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_504) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0))))))) (not (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| |c_#StackHeapBarrier|)))) (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| Int)) (or (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| Int) (v_ArrVal_495 (Array Int Int))) (or (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| Int) (v_ArrVal_497 (Array Int Int))) (or (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_25| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| v_ArrVal_497) |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14| v_ArrVal_503) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0) (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_14|))) (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_24| |c_#StackHeapBarrier|)))))) (not (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_16| |c_#StackHeapBarrier|))))) is different from false [2022-11-21 13:53:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2022-11-21 13:53:12,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493069458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:12,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:53:12,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 34 [2022-11-21 13:53:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001825104] [2022-11-21 13:53:12,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:12,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:53:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:12,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:53:12,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=575, Unknown=38, NotChecked=342, Total=1122 [2022-11-21 13:53:12,979 INFO L87 Difference]: Start difference. First operand 201 states and 243 transitions. Second operand has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:18,077 INFO L93 Difference]: Finished difference Result 365 states and 425 transitions. [2022-11-21 13:53:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:53:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-21 13:53:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:18,079 INFO L225 Difference]: With dead ends: 365 [2022-11-21 13:53:18,079 INFO L226 Difference]: Without dead ends: 365 [2022-11-21 13:53:18,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 6 IntricatePredicates, 3 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=460, Invalid=1086, Unknown=38, NotChecked=486, Total=2070 [2022-11-21 13:53:18,081 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 197 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 648 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:18,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1114 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 344 Invalid, 0 Unknown, 648 Unchecked, 1.3s Time] [2022-11-21 13:53:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-21 13:53:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 279. [2022-11-21 13:53:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 253 states have (on average 1.2806324110671936) internal successors, (324), 278 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 324 transitions. [2022-11-21 13:53:18,088 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 324 transitions. Word has length 33 [2022-11-21 13:53:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:18,088 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 324 transitions. [2022-11-21 13:53:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 324 transitions. [2022-11-21 13:53:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 13:53:18,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:18,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:18,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:18,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:18,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -919962184, now seen corresponding path program 1 times [2022-11-21 13:53:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011595424] [2022-11-21 13:53:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:53:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:18,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011595424] [2022-11-21 13:53:18,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011595424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:18,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:18,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:53:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170518808] [2022-11-21 13:53:18,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:18,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:53:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:53:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:18,411 INFO L87 Difference]: Start difference. First operand 279 states and 324 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:18,460 INFO L93 Difference]: Finished difference Result 341 states and 386 transitions. [2022-11-21 13:53:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:53:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-21 13:53:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:18,462 INFO L225 Difference]: With dead ends: 341 [2022-11-21 13:53:18,463 INFO L226 Difference]: Without dead ends: 341 [2022-11-21 13:53:18,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:53:18,464 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 250 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:18,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 188 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:53:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-21 13:53:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 279. [2022-11-21 13:53:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 253 states have (on average 1.2806324110671936) internal successors, (324), 278 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 324 transitions. [2022-11-21 13:53:18,474 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 324 transitions. Word has length 55 [2022-11-21 13:53:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 324 transitions. [2022-11-21 13:53:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 324 transitions. [2022-11-21 13:53:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 13:53:18,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:18,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:18,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 13:53:18,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1545942185, now seen corresponding path program 1 times [2022-11-21 13:53:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113159950] [2022-11-21 13:53:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 13:53:18,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:18,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113159950] [2022-11-21 13:53:18,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113159950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:18,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:18,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:53:18,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208512318] [2022-11-21 13:53:18,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:53:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:53:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:53:18,850 INFO L87 Difference]: Start difference. First operand 279 states and 324 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:19,281 INFO L93 Difference]: Finished difference Result 470 states and 540 transitions. [2022-11-21 13:53:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:53:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-21 13:53:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:19,284 INFO L225 Difference]: With dead ends: 470 [2022-11-21 13:53:19,284 INFO L226 Difference]: Without dead ends: 470 [2022-11-21 13:53:19,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:53:19,285 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 943 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 409 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:53:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-21 13:53:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 305. [2022-11-21 13:53:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 280 states have (on average 1.2857142857142858) internal successors, (360), 304 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 360 transitions. [2022-11-21 13:53:19,294 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 360 transitions. Word has length 56 [2022-11-21 13:53:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 360 transitions. [2022-11-21 13:53:19,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 360 transitions. [2022-11-21 13:53:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 13:53:19,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:19,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 13:53:19,297 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1545942186, now seen corresponding path program 1 times [2022-11-21 13:53:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:19,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227107261] [2022-11-21 13:53:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:53:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227107261] [2022-11-21 13:53:19,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227107261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:53:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121068334] [2022-11-21 13:53:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:19,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:19,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:53:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:53:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:53:19,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:53:19,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121068334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:19,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:53:19,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-11-21 13:53:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88751195] [2022-11-21 13:53:19,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:19,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 13:53:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 13:53:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:53:19,928 INFO L87 Difference]: Start difference. First operand 305 states and 360 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:20,402 INFO L93 Difference]: Finished difference Result 688 states and 794 transitions. [2022-11-21 13:53:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 13:53:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-21 13:53:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:20,405 INFO L225 Difference]: With dead ends: 688 [2022-11-21 13:53:20,405 INFO L226 Difference]: Without dead ends: 688 [2022-11-21 13:53:20,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:53:20,406 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 558 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 2304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:53:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-21 13:53:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 347. [2022-11-21 13:53:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 322 states have (on average 1.2857142857142858) internal successors, (414), 346 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 414 transitions. [2022-11-21 13:53:20,431 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 414 transitions. Word has length 56 [2022-11-21 13:53:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:20,431 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 414 transitions. [2022-11-21 13:53:20,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 414 transitions. [2022-11-21 13:53:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 13:53:20,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:20,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:20,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:20,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:20,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash -276278870, now seen corresponding path program 2 times [2022-11-21 13:53:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:20,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632205521] [2022-11-21 13:53:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:53:21,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632205521] [2022-11-21 13:53:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632205521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:21,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:21,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:53:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570617447] [2022-11-21 13:53:21,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:53:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:53:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:53:21,151 INFO L87 Difference]: Start difference. First operand 347 states and 414 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:21,570 INFO L93 Difference]: Finished difference Result 511 states and 616 transitions. [2022-11-21 13:53:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:53:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-21 13:53:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:21,573 INFO L225 Difference]: With dead ends: 511 [2022-11-21 13:53:21,573 INFO L226 Difference]: Without dead ends: 511 [2022-11-21 13:53:21,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:53:21,574 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1043 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:21,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 348 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:53:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-21 13:53:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 380. [2022-11-21 13:53:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 355 states have (on average 1.3070422535211268) internal successors, (464), 379 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 464 transitions. [2022-11-21 13:53:21,585 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 464 transitions. Word has length 56 [2022-11-21 13:53:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:21,585 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 464 transitions. [2022-11-21 13:53:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 464 transitions. [2022-11-21 13:53:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 13:53:21,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:21,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:21,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 13:53:21,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash 25284007, now seen corresponding path program 1 times [2022-11-21 13:53:21,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:21,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040623350] [2022-11-21 13:53:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:21,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:53:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040623350] [2022-11-21 13:53:21,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040623350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:21,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:21,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 13:53:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525018218] [2022-11-21 13:53:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:21,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:53:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:53:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:53:21,786 INFO L87 Difference]: Start difference. First operand 380 states and 464 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:21,997 INFO L93 Difference]: Finished difference Result 430 states and 532 transitions. [2022-11-21 13:53:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:53:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-21 13:53:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:22,000 INFO L225 Difference]: With dead ends: 430 [2022-11-21 13:53:22,000 INFO L226 Difference]: Without dead ends: 430 [2022-11-21 13:53:22,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:53:22,000 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:22,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 507 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:53:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-21 13:53:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 418. [2022-11-21 13:53:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 393 states have (on average 1.3333333333333333) internal successors, (524), 417 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 524 transitions. [2022-11-21 13:53:22,010 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 524 transitions. Word has length 57 [2022-11-21 13:53:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:22,011 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 524 transitions. [2022-11-21 13:53:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 524 transitions. [2022-11-21 13:53:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 13:53:22,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:22,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:22,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 13:53:22,012 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 783803729, now seen corresponding path program 1 times [2022-11-21 13:53:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250999339] [2022-11-21 13:53:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:22,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:53:22,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250999339] [2022-11-21 13:53:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250999339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:22,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:22,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 13:53:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634314729] [2022-11-21 13:53:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:53:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:53:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:53:22,291 INFO L87 Difference]: Start difference. First operand 418 states and 524 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:22,521 INFO L93 Difference]: Finished difference Result 516 states and 637 transitions. [2022-11-21 13:53:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:53:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-21 13:53:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:22,523 INFO L225 Difference]: With dead ends: 516 [2022-11-21 13:53:22,523 INFO L226 Difference]: Without dead ends: 516 [2022-11-21 13:53:22,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:53:22,524 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 659 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:22,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 415 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:53:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-21 13:53:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 418. [2022-11-21 13:53:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 393 states have (on average 1.3206106870229009) internal successors, (519), 417 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 519 transitions. [2022-11-21 13:53:22,539 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 519 transitions. Word has length 58 [2022-11-21 13:53:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:22,540 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 519 transitions. [2022-11-21 13:53:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 519 transitions. [2022-11-21 13:53:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 13:53:22,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:22,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-21 13:53:22,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 13:53:22,542 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-21 13:53:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1466385390, now seen corresponding path program 1 times [2022-11-21 13:53:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403329444] [2022-11-21 13:53:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:22,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-21 13:53:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:23,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403329444] [2022-11-21 13:53:23,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403329444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:53:23,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609899130] [2022-11-21 13:53:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:23,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:23,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f52bfc38-5998-47c3-84ba-d4e1e8f19909/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:53:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-21 13:53:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:23,953 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 [2022-11-21 13:53:24,009 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 13:53:24,010 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 [2022-11-21 13:53:24,193 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 [2022-11-21 13:53:24,497 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 [2022-11-21 13:53:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:53:24,589 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 23 treesize of output 22 [2022-11-21 13:53:24,739 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 21 treesize of output 20 [2022-11-21 13:53:24,758 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 11 treesize of output 7 [2022-11-21 13:53:24,910 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 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-21 13:53:24,923 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 23 treesize of output 22 [2022-11-21 13:53:25,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 13:53:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:53:25,548 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 13:53:25,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 42 [2022-11-21 13:53:25,556 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 13:53:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 15 [2022-11-21 13:53:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:53:25,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:26,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:53:26,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1424 treesize of output 1405