./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:43,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:44,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:43:44,062 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:44,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:44,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:44,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:44,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:44,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:44,115 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:44,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:44,117 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:44,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:44,120 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:44,121 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:44,121 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:44,122 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:44,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:44,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:44,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:44,124 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:43:44,125 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:43:44,125 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:43:44,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:44,126 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:43:44,127 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:43:44,127 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:44,128 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:44,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:44,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:44,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:44,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:44,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:44,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:44,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:44,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:44,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:44,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:44,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:44,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:44,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:44,135 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c [2023-11-26 11:43:44,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:44,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:44,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:44,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:44,553 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:44,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2023-11-26 11:43:47,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:48,009 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:48,009 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2023-11-26 11:43:48,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/data/038a0e700/587795a5df114870b751912c0c097c4e/FLAG17797ef94 [2023-11-26 11:43:48,048 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/data/038a0e700/587795a5df114870b751912c0c097c4e [2023-11-26 11:43:48,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:48,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:48,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:48,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:48,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:48,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c532fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48, skipping insertion in model container [2023-11-26 11:43:48,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:48,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:48,543 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:43:48,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:48,633 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:43:48,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48 WrapperNode [2023-11-26 11:43:48,634 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:48,635 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:48,635 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:43:48,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:43:48,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,726 INFO L138 Inliner]: procedures = 127, calls = 45, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 144 [2023-11-26 11:43:48,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:48,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:43:48,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:43:48,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:43:48,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,778 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 17, 8]. 63 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 14 writes are split as follows [0, 13, 1]. [2023-11-26 11:43:48,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,791 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:43:48,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:43:48,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:43:48,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:43:48,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (1/1) ... [2023-11-26 11:43:48,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:48,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:43:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:43:48,908 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-26 11:43:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-26 11:43:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:43:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:43:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:43:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:43:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:43:48,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:43:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:43:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:43:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:43:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:43:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:43:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:43:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:43:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:43:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:43:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:43:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:43:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:43:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:43:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:43:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:43:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:43:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:43:48,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:43:49,146 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:43:49,149 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:43:49,192 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-26 11:43:49,678 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:43:49,730 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:43:49,730 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:43:49,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:49 BoogieIcfgContainer [2023-11-26 11:43:49,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:43:49,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:43:49,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:43:49,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:43:49,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:43:48" (1/3) ... [2023-11-26 11:43:49,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5258bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:49, skipping insertion in model container [2023-11-26 11:43:49,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:48" (2/3) ... [2023-11-26 11:43:49,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5258bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:49, skipping insertion in model container [2023-11-26 11:43:49,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:49" (3/3) ... [2023-11-26 11:43:49,741 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_insert_equal.i [2023-11-26 11:43:49,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:43:49,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2023-11-26 11:43:49,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:43:49,867 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=PETRI_NET, 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;@3282f9ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:43:49,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-26 11:43:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 51 states have (on average 2.372549019607843) internal successors, (121), 105 states have internal predecessors, (121), 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) [2023-11-26 11:43:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:43:49,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:49,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:43:49,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:49,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:49,889 INFO L85 PathProgramCache]: Analyzing trace with hash 7672370, now seen corresponding path program 1 times [2023-11-26 11:43:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:49,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344155319] [2023-11-26 11:43:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:50,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:50,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344155319] [2023-11-26 11:43:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344155319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:50,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344273469] [2023-11-26 11:43:50,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:50,336 INFO L87 Difference]: Start difference. First operand has 107 states, 51 states have (on average 2.372549019607843) internal successors, (121), 105 states have internal predecessors, (121), 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 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) [2023-11-26 11:43:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:50,551 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-11-26 11:43:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:50,554 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 [2023-11-26 11:43:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:50,565 INFO L225 Difference]: With dead ends: 103 [2023-11-26 11:43:50,565 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 11:43:50,567 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 [2023-11-26 11:43:50,573 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:50,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 140 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:43:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 11:43:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-26 11:43:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 97 states have internal predecessors, (106), 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) [2023-11-26 11:43:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-11-26 11:43:50,635 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 4 [2023-11-26 11:43:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:50,637 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-11-26 11:43:50,637 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) [2023-11-26 11:43:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-11-26 11:43:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:43:50,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:50,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:43:50,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:43:50,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:50,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash 7672371, now seen corresponding path program 1 times [2023-11-26 11:43:50,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:50,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604046691] [2023-11-26 11:43:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:50,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604046691] [2023-11-26 11:43:50,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604046691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:50,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:50,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:50,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47681801] [2023-11-26 11:43:50,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:50,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:50,829 INFO L87 Difference]: Start difference. First operand 98 states and 106 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) [2023-11-26 11:43:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:50,998 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-11-26 11:43:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:50,999 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 [2023-11-26 11:43:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:51,004 INFO L225 Difference]: With dead ends: 95 [2023-11-26 11:43:51,004 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 11:43:51,006 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 [2023-11-26 11:43:51,008 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:51,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 11:43:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-26 11:43:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 94 states have internal predecessors, (103), 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) [2023-11-26 11:43:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-26 11:43:51,036 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 4 [2023-11-26 11:43:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:51,037 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-26 11:43:51,037 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) [2023-11-26 11:43:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-26 11:43:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:43:51,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:51,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:43:51,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:43:51,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:51,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 237983771, now seen corresponding path program 1 times [2023-11-26 11:43:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512774592] [2023-11-26 11:43:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512774592] [2023-11-26 11:43:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512774592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:51,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299622500] [2023-11-26 11:43:51,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:51,199 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-26 11:43:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:51,250 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2023-11-26 11:43:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-26 11:43:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:51,255 INFO L225 Difference]: With dead ends: 105 [2023-11-26 11:43:51,256 INFO L226 Difference]: Without dead ends: 105 [2023-11-26 11:43:51,259 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 [2023-11-26 11:43:51,265 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:51,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:43:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-26 11:43:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2023-11-26 11:43:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 49 states have (on average 2.122448979591837) internal successors, (104), 95 states have internal predecessors, (104), 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) [2023-11-26 11:43:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2023-11-26 11:43:51,273 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 5 [2023-11-26 11:43:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:51,274 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2023-11-26 11:43:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-26 11:43:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2023-11-26 11:43:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 11:43:51,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:51,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:43:51,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1101312842, now seen corresponding path program 1 times [2023-11-26 11:43:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906697299] [2023-11-26 11:43:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:51,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906697299] [2023-11-26 11:43:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906697299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:51,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843432349] [2023-11-26 11:43:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:51,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:51,344 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-11-26 11:43:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:51,400 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-11-26 11:43:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2023-11-26 11:43:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:51,402 INFO L225 Difference]: With dead ends: 102 [2023-11-26 11:43:51,402 INFO L226 Difference]: Without dead ends: 102 [2023-11-26 11:43:51,403 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 [2023-11-26 11:43:51,404 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:51,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 175 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:43:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-26 11:43:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-26 11:43:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 100 states have internal predecessors, (109), 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) [2023-11-26 11:43:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2023-11-26 11:43:51,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 8 [2023-11-26 11:43:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:51,413 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2023-11-26 11:43:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-11-26 11:43:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2023-11-26 11:43:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:43:51,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:51,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:51,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:43:51,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:51,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1521644016, now seen corresponding path program 1 times [2023-11-26 11:43:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814281898] [2023-11-26 11:43:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814281898] [2023-11-26 11:43:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814281898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900537969] [2023-11-26 11:43:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:51,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:51,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:43:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:51,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:43:51,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:51,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:51,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900537969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:51,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:51,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-26 11:43:51,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050336589] [2023-11-26 11:43:51,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:51,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:43:51,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:43:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:51,790 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-11-26 11:43:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:51,850 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2023-11-26 11:43:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:43:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 [2023-11-26 11:43:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:51,852 INFO L225 Difference]: With dead ends: 103 [2023-11-26 11:43:51,852 INFO L226 Difference]: Without dead ends: 103 [2023-11-26 11:43:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:51,854 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:51,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 348 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-26 11:43:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-26 11:43:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 102 states have internal predecessors, (111), 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) [2023-11-26 11:43:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2023-11-26 11:43:51,861 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 12 [2023-11-26 11:43:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:51,862 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2023-11-26 11:43:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-11-26 11:43:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2023-11-26 11:43:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:43:51,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:51,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:43:51,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:43:52,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:52,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:52,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1967757631, now seen corresponding path program 1 times [2023-11-26 11:43:52,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:52,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819639214] [2023-11-26 11:43:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819639214] [2023-11-26 11:43:52,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819639214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941442272] [2023-11-26 11:43:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:52,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:52,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:52,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:52,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:43:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:52,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:43:52,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:52,528 INFO L378 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 [2023-11-26 11:43:52,581 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:43:52,581 INFO L378 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 19 treesize of output 16 [2023-11-26 11:43:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:52,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941442272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:52,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:52,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-11-26 11:43:52,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550855801] [2023-11-26 11:43:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:43:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:43:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:43:52,748 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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) [2023-11-26 11:43:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:53,070 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-11-26 11:43:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:43:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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 15 [2023-11-26 11:43:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:53,071 INFO L225 Difference]: With dead ends: 102 [2023-11-26 11:43:53,072 INFO L226 Difference]: Without dead ends: 102 [2023-11-26 11:43:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:43:53,073 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 7 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:53,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 310 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:43:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-26 11:43:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-26 11:43:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 101 states have internal predecessors, (110), 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) [2023-11-26 11:43:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2023-11-26 11:43:53,080 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 15 [2023-11-26 11:43:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:53,081 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2023-11-26 11:43:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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) [2023-11-26 11:43:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2023-11-26 11:43:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:43:53,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:53,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:43:53,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:53,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:53,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1967757630, now seen corresponding path program 1 times [2023-11-26 11:43:53,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:53,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371207098] [2023-11-26 11:43:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:53,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:53,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371207098] [2023-11-26 11:43:53,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371207098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:53,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772581867] [2023-11-26 11:43:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:53,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:53,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:43:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:53,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:43:53,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:53,701 INFO L378 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 8 treesize of output 1 [2023-11-26 11:43:53,705 INFO L378 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 [2023-11-26 11:43:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:53,773 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:53,784 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:43:53,785 INFO L378 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 [2023-11-26 11:43:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:53,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772581867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:54,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:54,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-26 11:43:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944182172] [2023-11-26 11:43:54,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:54,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:43:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:43:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:43:54,086 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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) [2023-11-26 11:43:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:54,446 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-11-26 11:43:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:43:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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 15 [2023-11-26 11:43:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:54,447 INFO L225 Difference]: With dead ends: 101 [2023-11-26 11:43:54,447 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 11:43:54,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:43:54,448 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:54,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 259 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:43:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 11:43:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-26 11:43:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 100 states have internal predecessors, (109), 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) [2023-11-26 11:43:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2023-11-26 11:43:54,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 15 [2023-11-26 11:43:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2023-11-26 11:43:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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) [2023-11-26 11:43:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2023-11-26 11:43:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:43:54,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:54,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:43:54,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:43:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:54,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:54,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash -259289477, now seen corresponding path program 2 times [2023-11-26 11:43:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259955090] [2023-11-26 11:43:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259955090] [2023-11-26 11:43:54,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259955090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220112211] [2023-11-26 11:43:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:43:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:54,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:54,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:43:54,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:43:54,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:43:54,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:43:54,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:54,911 INFO L378 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 [2023-11-26 11:43:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:43:54,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220112211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:43:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 11:43:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985746252] [2023-11-26 11:43:54,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:54,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:54,921 INFO L87 Difference]: Start difference. First operand 101 states and 109 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) [2023-11-26 11:43:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:54,997 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-11-26 11:43:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:54,997 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 19 [2023-11-26 11:43:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:54,998 INFO L225 Difference]: With dead ends: 98 [2023-11-26 11:43:54,998 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 11:43:54,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:54,999 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:55,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 11:43:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-26 11:43:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 97 states have internal predecessors, (106), 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) [2023-11-26 11:43:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-11-26 11:43:55,004 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 19 [2023-11-26 11:43:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:55,004 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-11-26 11:43:55,004 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) [2023-11-26 11:43:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-11-26 11:43:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:43:55,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:55,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:43:55,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:55,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:55,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash -259289476, now seen corresponding path program 1 times [2023-11-26 11:43:55,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:55,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453353297] [2023-11-26 11:43:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:55,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453353297] [2023-11-26 11:43:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453353297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190000048] [2023-11-26 11:43:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:55,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:55,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:43:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:55,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:43:55,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:55,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:43:55,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190000048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:55,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:55,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-26 11:43:55,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929003662] [2023-11-26 11:43:55,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:55,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:55,482 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-11-26 11:43:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:55,550 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2023-11-26 11:43:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:43:55,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 [2023-11-26 11:43:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:55,551 INFO L225 Difference]: With dead ends: 98 [2023-11-26 11:43:55,551 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 11:43:55,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:43:55,554 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:55,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 237 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 11:43:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-26 11:43:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 56 states have (on average 1.875) internal successors, (105), 97 states have internal predecessors, (105), 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) [2023-11-26 11:43:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2023-11-26 11:43:55,559 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 19 [2023-11-26 11:43:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:55,560 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2023-11-26 11:43:55,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-11-26 11:43:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2023-11-26 11:43:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:43:55,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:55,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:55,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:55,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:55,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:55,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:55,768 INFO L85 PathProgramCache]: Analyzing trace with hash 257256453, now seen corresponding path program 1 times [2023-11-26 11:43:55,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:55,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298782815] [2023-11-26 11:43:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:43:55,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298782815] [2023-11-26 11:43:55,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298782815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:55,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:55,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:55,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247809254] [2023-11-26 11:43:55,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:55,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:55,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:55,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:55,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:55,908 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-26 11:43:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:55,986 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2023-11-26 11:43:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:55,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2023-11-26 11:43:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:55,988 INFO L225 Difference]: With dead ends: 95 [2023-11-26 11:43:55,988 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 11:43:55,988 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 [2023-11-26 11:43:55,989 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:55,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 11:43:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-26 11:43:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 94 states have internal predecessors, (102), 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) [2023-11-26 11:43:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2023-11-26 11:43:55,993 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 20 [2023-11-26 11:43:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:55,994 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2023-11-26 11:43:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-26 11:43:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2023-11-26 11:43:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:43:55,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:55,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:55,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:43:55,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:55,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1705339265, now seen corresponding path program 1 times [2023-11-26 11:43:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34234800] [2023-11-26 11:43:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:56,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34234800] [2023-11-26 11:43:56,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34234800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:56,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538617747] [2023-11-26 11:43:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:56,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:56,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:56,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:43:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:56,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:43:56,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:56,553 INFO L378 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 [2023-11-26 11:43:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:56,567 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:56,605 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:56,631 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 11:43:56,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-26 11:43:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:56,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:43:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538617747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:43:56,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:43:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 7 [2023-11-26 11:43:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724841513] [2023-11-26 11:43:56,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:43:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:43:56,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:43:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:43:56,793 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-11-26 11:43:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:56,975 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2023-11-26 11:43:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:43:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 [2023-11-26 11:43:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:56,976 INFO L225 Difference]: With dead ends: 99 [2023-11-26 11:43:56,976 INFO L226 Difference]: Without dead ends: 99 [2023-11-26 11:43:56,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:43:56,977 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 156 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:56,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 136 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:43:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-26 11:43:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2023-11-26 11:43:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 87 states have internal predecessors, (95), 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) [2023-11-26 11:43:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2023-11-26 11:43:56,981 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 23 [2023-11-26 11:43:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:56,981 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2023-11-26 11:43:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-11-26 11:43:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2023-11-26 11:43:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:43:56,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:56,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:56,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:57,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:43:57,190 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1705339266, now seen corresponding path program 1 times [2023-11-26 11:43:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:57,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919489978] [2023-11-26 11:43:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:57,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:43:57,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:57,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919489978] [2023-11-26 11:43:57,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919489978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:43:57,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048002288] [2023-11-26 11:43:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:57,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:43:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:57,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:43:57,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:43:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:57,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:43:57,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:57,993 INFO L378 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 8 treesize of output 1 [2023-11-26 11:43:58,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,026 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,119 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,210 INFO L378 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 14 treesize of output 9 [2023-11-26 11:43:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:43:58,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048002288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:58,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:43:58,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-11-26 11:43:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059214948] [2023-11-26 11:43:58,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:58,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:58,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:43:58,245 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-26 11:43:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:58,361 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2023-11-26 11:43:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:43:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 [2023-11-26 11:43:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:58,362 INFO L225 Difference]: With dead ends: 81 [2023-11-26 11:43:58,362 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 11:43:58,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:43:58,364 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:58,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 66 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:43:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 11:43:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-26 11:43:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 80 states have internal predecessors, (88), 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) [2023-11-26 11:43:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2023-11-26 11:43:58,367 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 23 [2023-11-26 11:43:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:58,368 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2023-11-26 11:43:58,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-26 11:43:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2023-11-26 11:43:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:43:58,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:58,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:58,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:43:58,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:43:58,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:58,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1846316124, now seen corresponding path program 1 times [2023-11-26 11:43:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629289886] [2023-11-26 11:43:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629289886] [2023-11-26 11:43:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629289886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:58,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:58,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:43:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394517978] [2023-11-26 11:43:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:43:58,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:43:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:43:58,978 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-26 11:43:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:59,220 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2023-11-26 11:43:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:43:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 [2023-11-26 11:43:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:59,223 INFO L225 Difference]: With dead ends: 111 [2023-11-26 11:43:59,223 INFO L226 Difference]: Without dead ends: 111 [2023-11-26 11:43:59,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:43:59,224 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 100 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:59,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 173 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:43:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-26 11:43:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2023-11-26 11:43:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.671875) internal successors, (107), 88 states have internal predecessors, (107), 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) [2023-11-26 11:43:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2023-11-26 11:43:59,229 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 25 [2023-11-26 11:43:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:59,229 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2023-11-26 11:43:59,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-26 11:43:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2023-11-26 11:43:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:43:59,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:59,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:43:59,231 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:59,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1846316123, now seen corresponding path program 1 times [2023-11-26 11:43:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936939907] [2023-11-26 11:43:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:59,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:43:59,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:43:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936939907] [2023-11-26 11:43:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936939907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:59,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:59,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:43:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138243826] [2023-11-26 11:43:59,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:43:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:43:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:43:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:43:59,688 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2023-11-26 11:43:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:43:59,918 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2023-11-26 11:43:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:43:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 [2023-11-26 11:43:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:43:59,919 INFO L225 Difference]: With dead ends: 109 [2023-11-26 11:43:59,919 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 11:43:59,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:43:59,920 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:43:59,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 175 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:43:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 11:43:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2023-11-26 11:43:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.640625) internal successors, (105), 88 states have internal predecessors, (105), 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) [2023-11-26 11:43:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2023-11-26 11:43:59,924 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 25 [2023-11-26 11:43:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:43:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2023-11-26 11:43:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2023-11-26 11:43:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2023-11-26 11:43:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:43:59,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:43:59,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:43:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:43:59,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:43:59,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1401226578, now seen corresponding path program 1 times [2023-11-26 11:43:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:43:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699165162] [2023-11-26 11:43:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:43:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:00,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699165162] [2023-11-26 11:44:00,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699165162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597300767] [2023-11-26 11:44:00,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:00,005 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-26 11:44:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:00,041 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-11-26 11:44:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 [2023-11-26 11:44:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:00,042 INFO L225 Difference]: With dead ends: 85 [2023-11-26 11:44:00,042 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 11:44:00,044 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 [2023-11-26 11:44:00,045 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:00,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 121 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 11:44:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-26 11:44:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 83 states have internal predecessors, (92), 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) [2023-11-26 11:44:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-11-26 11:44:00,048 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 26 [2023-11-26 11:44:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:00,048 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-11-26 11:44:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-26 11:44:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-11-26 11:44:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:44:00,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:00,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:44:00,051 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:00,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash -488167697, now seen corresponding path program 1 times [2023-11-26 11:44:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470294284] [2023-11-26 11:44:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:00,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470294284] [2023-11-26 11:44:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470294284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463983307] [2023-11-26 11:44:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:00,257 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2023-11-26 11:44:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:00,307 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2023-11-26 11:44:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 27 [2023-11-26 11:44:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:00,309 INFO L225 Difference]: With dead ends: 81 [2023-11-26 11:44:00,309 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 11:44:00,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:00,310 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 96 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:00,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 135 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 11:44:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-26 11:44:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 80 states have internal predecessors, (88), 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) [2023-11-26 11:44:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2023-11-26 11:44:00,315 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 27 [2023-11-26 11:44:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:00,316 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2023-11-26 11:44:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2023-11-26 11:44:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2023-11-26 11:44:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:44:00,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:00,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:00,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:44:00,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:00,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash -488331034, now seen corresponding path program 1 times [2023-11-26 11:44:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183896081] [2023-11-26 11:44:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183896081] [2023-11-26 11:44:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183896081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683532221] [2023-11-26 11:44:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:00,431 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2023-11-26 11:44:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:00,527 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2023-11-26 11:44:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 27 [2023-11-26 11:44:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:00,528 INFO L225 Difference]: With dead ends: 78 [2023-11-26 11:44:00,528 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 11:44:00,529 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 [2023-11-26 11:44:00,529 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 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 [2023-11-26 11:44:00,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 11:44:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-26 11:44:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 77 states have internal predecessors, (85), 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) [2023-11-26 11:44:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2023-11-26 11:44:00,533 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 27 [2023-11-26 11:44:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:00,533 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2023-11-26 11:44:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2023-11-26 11:44:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2023-11-26 11:44:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:44:00,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:00,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:44:00,535 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:00,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash -488331033, now seen corresponding path program 1 times [2023-11-26 11:44:00,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207134564] [2023-11-26 11:44:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207134564] [2023-11-26 11:44:00,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207134564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729879619] [2023-11-26 11:44:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:00,661 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2023-11-26 11:44:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:00,699 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2023-11-26 11:44:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 27 [2023-11-26 11:44:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:00,700 INFO L225 Difference]: With dead ends: 77 [2023-11-26 11:44:00,700 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 11:44:00,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:00,701 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:00,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 119 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:44:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 11:44:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-26 11:44:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.456140350877193) internal successors, (83), 76 states have internal predecessors, (83), 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) [2023-11-26 11:44:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-11-26 11:44:00,704 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 27 [2023-11-26 11:44:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:00,705 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-11-26 11:44:00,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2023-11-26 11:44:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-11-26 11:44:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:44:00,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:00,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:00,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:44:00,708 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:00,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2046668995, now seen corresponding path program 1 times [2023-11-26 11:44:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720493522] [2023-11-26 11:44:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:00,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:00,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720493522] [2023-11-26 11:44:00,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720493522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:00,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:00,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:00,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951757490] [2023-11-26 11:44:00,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:00,804 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-26 11:44:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:00,901 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2023-11-26 11:44:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-11-26 11:44:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:00,902 INFO L225 Difference]: With dead ends: 77 [2023-11-26 11:44:00,902 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 11:44:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:00,903 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:00,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 11:44:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-11-26 11:44:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 75 states have internal predecessors, (82), 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) [2023-11-26 11:44:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2023-11-26 11:44:00,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 28 [2023-11-26 11:44:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:00,907 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2023-11-26 11:44:00,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-26 11:44:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2023-11-26 11:44:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:44:00,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:00,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:44:00,908 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:00,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2046668996, now seen corresponding path program 1 times [2023-11-26 11:44:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784501303] [2023-11-26 11:44:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784501303] [2023-11-26 11:44:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784501303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:01,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901578034] [2023-11-26 11:44:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:01,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:44:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:01,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:44:01,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:01,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901578034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:01,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-26 11:44:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958286369] [2023-11-26 11:44:01,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:01,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:01,480 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-26 11:44:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:01,572 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-11-26 11:44:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-11-26 11:44:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:01,573 INFO L225 Difference]: With dead ends: 75 [2023-11-26 11:44:01,573 INFO L226 Difference]: Without dead ends: 75 [2023-11-26 11:44:01,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:01,574 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:01,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-26 11:44:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-26 11:44:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 74 states have internal predecessors, (81), 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) [2023-11-26 11:44:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-26 11:44:01,577 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 28 [2023-11-26 11:44:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:01,577 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-26 11:44:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-11-26 11:44:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-26 11:44:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:44:01,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:01,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:01,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:01,786 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -977770530, now seen corresponding path program 1 times [2023-11-26 11:44:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729162324] [2023-11-26 11:44:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:44:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729162324] [2023-11-26 11:44:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729162324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:01,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:01,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235520764] [2023-11-26 11:44:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:01,978 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2023-11-26 11:44:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:02,075 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-26 11:44:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 29 [2023-11-26 11:44:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:02,076 INFO L225 Difference]: With dead ends: 72 [2023-11-26 11:44:02,076 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 11:44:02,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:44:02,077 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:02,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 159 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 11:44:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-26 11:44:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.368421052631579) internal successors, (78), 71 states have internal predecessors, (78), 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) [2023-11-26 11:44:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-11-26 11:44:02,082 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 29 [2023-11-26 11:44:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:02,082 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-11-26 11:44:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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) [2023-11-26 11:44:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-11-26 11:44:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 11:44:02,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:02,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:02,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:44:02,084 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:02,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash -293620857, now seen corresponding path program 1 times [2023-11-26 11:44:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:02,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371709694] [2023-11-26 11:44:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371709694] [2023-11-26 11:44:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371709694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853334719] [2023-11-26 11:44:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:03,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:03,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:03,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:03,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:44:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:03,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-26 11:44:03,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:03,346 INFO L378 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 [2023-11-26 11:44:03,437 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:44:03,437 INFO L378 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 [2023-11-26 11:44:03,524 INFO L378 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 [2023-11-26 11:44:03,585 INFO L378 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 11 [2023-11-26 11:44:03,634 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 11:44:03,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 11:44:03,817 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-11-26 11:44:03,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-11-26 11:44:03,928 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:03,960 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:03,993 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:04,055 INFO L378 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 66 treesize of output 38 [2023-11-26 11:44:04,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 33 treesize of output 17 [2023-11-26 11:44:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:04,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:04,533 INFO L378 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 34 treesize of output 26 [2023-11-26 11:44:04,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-26 11:44:04,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:04,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2023-11-26 11:44:04,874 INFO L378 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 90 treesize of output 78 [2023-11-26 11:44:04,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-26 11:44:04,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2023-11-26 11:44:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:05,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853334719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:05,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:05,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 36 [2023-11-26 11:44:05,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213140888] [2023-11-26 11:44:05,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-26 11:44:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-26 11:44:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1167, Unknown=4, NotChecked=0, Total=1332 [2023-11-26 11:44:05,482 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 37 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 37 states have internal predecessors, (92), 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) [2023-11-26 11:44:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:06,975 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-26 11:44:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:44:06,978 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 37 states have internal predecessors, (92), 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 32 [2023-11-26 11:44:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:06,979 INFO L225 Difference]: With dead ends: 79 [2023-11-26 11:44:06,979 INFO L226 Difference]: Without dead ends: 79 [2023-11-26 11:44:06,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=296, Invalid=1956, Unknown=4, NotChecked=0, Total=2256 [2023-11-26 11:44:06,981 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:06,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 483 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:44:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-26 11:44:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2023-11-26 11:44:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 70 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) [2023-11-26 11:44:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-11-26 11:44:06,985 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 32 [2023-11-26 11:44:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:06,986 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-11-26 11:44:06,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 37 states have internal predecessors, (92), 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) [2023-11-26 11:44:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-11-26 11:44:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 11:44:06,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:06,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:07,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:44:07,188 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -293620856, now seen corresponding path program 1 times [2023-11-26 11:44:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720114481] [2023-11-26 11:44:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:08,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720114481] [2023-11-26 11:44:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720114481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:08,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809594545] [2023-11-26 11:44:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:08,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:08,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:08,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:08,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:44:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:09,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-26 11:44:09,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:09,120 INFO L378 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 [2023-11-26 11:44:09,231 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:44:09,232 INFO L378 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 [2023-11-26 11:44:09,315 INFO L378 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 [2023-11-26 11:44:09,329 INFO L378 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 [2023-11-26 11:44:09,398 INFO L378 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 11 [2023-11-26 11:44:09,405 INFO L378 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 19 treesize of output 18 [2023-11-26 11:44:09,523 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 11:44:09,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-11-26 11:44:09,536 INFO L378 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 31 treesize of output 16 [2023-11-26 11:44:09,741 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-11-26 11:44:09,742 INFO L378 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 1 case distinctions, treesize of input 22 treesize of output 29 [2023-11-26 11:44:09,783 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-26 11:44:09,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-26 11:44:09,894 INFO L378 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 31 treesize of output 20 [2023-11-26 11:44:09,916 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:09,947 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:09,964 INFO L378 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 31 treesize of output 20 [2023-11-26 11:44:10,002 INFO L378 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 50 treesize of output 33 [2023-11-26 11:44:10,015 INFO L378 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 31 treesize of output 20 [2023-11-26 11:44:10,083 INFO L378 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 59 treesize of output 35 [2023-11-26 11:44:10,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:44:10,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-11-26 11:44:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:10,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:10,577 INFO L378 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 76 treesize of output 60 [2023-11-26 11:44:10,583 INFO L378 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 64 treesize of output 48 [2023-11-26 11:44:10,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:10,988 INFO L378 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 121 treesize of output 125 [2023-11-26 11:44:11,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2023-11-26 11:44:11,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2023-11-26 11:44:11,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-11-26 11:44:11,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-26 11:44:11,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-11-26 11:44:11,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:44:11,526 INFO L378 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 39 treesize of output 27 [2023-11-26 11:44:11,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-26 11:44:11,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2023-11-26 11:44:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:44:11,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 32 [2023-11-26 11:44:11,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-26 11:44:11,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:11,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2023-11-26 11:44:11,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:44:11,594 INFO L378 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 36 treesize of output 24 [2023-11-26 11:44:11,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 11:44:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809594545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:12,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-11-26 11:44:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900105630] [2023-11-26 11:44:12,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:12,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-26 11:44:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-26 11:44:12,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1099, Unknown=20, NotChecked=0, Total=1260 [2023-11-26 11:44:12,151 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 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) [2023-11-26 11:44:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:14,337 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2023-11-26 11:44:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:44:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 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 32 [2023-11-26 11:44:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:14,339 INFO L225 Difference]: With dead ends: 77 [2023-11-26 11:44:14,339 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 11:44:14,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=389, Invalid=2241, Unknown=22, NotChecked=0, Total=2652 [2023-11-26 11:44:14,341 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:14,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 473 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:44:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 11:44:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2023-11-26 11:44:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 69 states have internal predecessors, (76), 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) [2023-11-26 11:44:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-11-26 11:44:14,345 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 32 [2023-11-26 11:44:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:14,345 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-11-26 11:44:14,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 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) [2023-11-26 11:44:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-11-26 11:44:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:44:14,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:14,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:14,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:44:14,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash 753950314, now seen corresponding path program 1 times [2023-11-26 11:44:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:14,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122156058] [2023-11-26 11:44:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:14,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122156058] [2023-11-26 11:44:14,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122156058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079443560] [2023-11-26 11:44:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:14,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:14,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:14,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:44:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:15,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:44:15,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:15,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:15,201 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-11-26 11:44:15,202 INFO L378 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 16 treesize of output 15 [2023-11-26 11:44:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079443560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:15,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-26 11:44:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379496648] [2023-11-26 11:44:15,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:44:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:44:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:44:15,244 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2023-11-26 11:44:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:15,488 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-11-26 11:44:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:44:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 [2023-11-26 11:44:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:15,490 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:44:15,490 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 11:44:15,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:44:15,491 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:15,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 280 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:44:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 11:44:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-26 11:44:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.3) internal successors, (65), 60 states have internal predecessors, (65), 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) [2023-11-26 11:44:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-26 11:44:15,494 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 33 [2023-11-26 11:44:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-26 11:44:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2023-11-26 11:44:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-26 11:44:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 11:44:15,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:15,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:15,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 11:44:15,706 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:15,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1595280701, now seen corresponding path program 1 times [2023-11-26 11:44:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619812427] [2023-11-26 11:44:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:44:15,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619812427] [2023-11-26 11:44:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619812427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681329347] [2023-11-26 11:44:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:15,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:15,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:44:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:16,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:44:16,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:16,240 INFO L378 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 [2023-11-26 11:44:16,295 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-26 11:44:16,295 INFO L378 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 18 treesize of output 21 [2023-11-26 11:44:16,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:44:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:44:16,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:16,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681329347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:16,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:16,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2023-11-26 11:44:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195058104] [2023-11-26 11:44:16,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:16,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:44:16,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:44:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:16,395 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2023-11-26 11:44:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:16,562 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2023-11-26 11:44:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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 35 [2023-11-26 11:44:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:16,564 INFO L225 Difference]: With dead ends: 91 [2023-11-26 11:44:16,564 INFO L226 Difference]: Without dead ends: 91 [2023-11-26 11:44:16,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:44:16,564 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 193 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:16,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 107 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-26 11:44:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2023-11-26 11:44:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 61 states have internal predecessors, (68), 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) [2023-11-26 11:44:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-26 11:44:16,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 35 [2023-11-26 11:44:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:16,568 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-26 11:44:16,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2023-11-26 11:44:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-26 11:44:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 11:44:16,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:16,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:16,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 11:44:16,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:16,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1595280702, now seen corresponding path program 1 times [2023-11-26 11:44:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:16,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335007754] [2023-11-26 11:44:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:17,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:17,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335007754] [2023-11-26 11:44:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335007754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415895790] [2023-11-26 11:44:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:17,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:17,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:17,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:44:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:17,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 11:44:17,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:17,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:44:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:17,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:17,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:17,961 INFO L378 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 33 treesize of output 37 [2023-11-26 11:44:18,162 INFO L378 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 8 treesize of output 4 [2023-11-26 11:44:18,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-26 11:44:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415895790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:18,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:18,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-26 11:44:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892654785] [2023-11-26 11:44:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:18,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:44:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:44:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:44:18,225 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 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) [2023-11-26 11:44:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:18,634 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2023-11-26 11:44:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:44:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 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 35 [2023-11-26 11:44:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:18,644 INFO L225 Difference]: With dead ends: 87 [2023-11-26 11:44:18,644 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 11:44:18,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:44:18,646 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 279 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:18,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 266 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:44:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 11:44:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2023-11-26 11:44:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 62 states have internal predecessors, (68), 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) [2023-11-26 11:44:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-26 11:44:18,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 35 [2023-11-26 11:44:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:18,656 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-26 11:44:18,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 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) [2023-11-26 11:44:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-26 11:44:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:44:18,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:18,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:18,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:18,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:44:18,865 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:18,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1193061626, now seen corresponding path program 1 times [2023-11-26 11:44:18,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:18,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599171451] [2023-11-26 11:44:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:18,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:44:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599171451] [2023-11-26 11:44:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599171451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:18,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:18,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:44:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719429108] [2023-11-26 11:44:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:44:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:44:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:44:18,997 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2023-11-26 11:44:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:19,098 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-11-26 11:44:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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 38 [2023-11-26 11:44:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:19,100 INFO L225 Difference]: With dead ends: 68 [2023-11-26 11:44:19,101 INFO L226 Difference]: Without dead ends: 68 [2023-11-26 11:44:19,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:19,103 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:19,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 150 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-26 11:44:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2023-11-26 11:44:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 62 states have internal predecessors, (67), 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) [2023-11-26 11:44:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-11-26 11:44:19,110 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 38 [2023-11-26 11:44:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:19,111 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-11-26 11:44:19,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2023-11-26 11:44:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-11-26 11:44:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 11:44:19,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:19,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-26 11:44:19,113 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:19,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1562172498, now seen corresponding path program 1 times [2023-11-26 11:44:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904281311] [2023-11-26 11:44:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:44:20,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:20,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904281311] [2023-11-26 11:44:20,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904281311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:20,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115408730] [2023-11-26 11:44:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:20,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:20,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:20,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:20,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:44:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:20,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-26 11:44:20,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:20,391 INFO L378 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 [2023-11-26 11:44:20,508 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-26 11:44:20,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:44:20,774 INFO L378 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 25 treesize of output 17 [2023-11-26 11:44:20,820 INFO L378 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 26 treesize of output 21 [2023-11-26 11:44:20,894 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2023-11-26 11:44:20,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2023-11-26 11:44:20,976 INFO L378 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 49 treesize of output 33 [2023-11-26 11:44:20,979 INFO L378 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 44 treesize of output 28 [2023-11-26 11:44:21,027 INFO L378 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 31 treesize of output 13 [2023-11-26 11:44:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:21,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:21,327 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2023-11-26 11:44:21,328 INFO L378 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 29 treesize of output 28 [2023-11-26 11:44:21,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:21,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-26 11:44:21,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:21,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2023-11-26 11:44:21,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-26 11:44:21,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 11:44:21,733 INFO L378 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 [2023-11-26 11:44:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115408730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:21,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-11-26 11:44:21,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673250633] [2023-11-26 11:44:21,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:21,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-26 11:44:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-26 11:44:21,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1368, Unknown=2, NotChecked=0, Total=1482 [2023-11-26 11:44:21,851 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 39 states have internal predecessors, (112), 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) [2023-11-26 11:44:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:23,490 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2023-11-26 11:44:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:44:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 39 states have internal predecessors, (112), 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 39 [2023-11-26 11:44:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:23,492 INFO L225 Difference]: With dead ends: 106 [2023-11-26 11:44:23,493 INFO L226 Difference]: Without dead ends: 106 [2023-11-26 11:44:23,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=2779, Unknown=2, NotChecked=0, Total=3080 [2023-11-26 11:44:23,495 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:23,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 414 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:44:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-26 11:44:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2023-11-26 11:44:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 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) [2023-11-26 11:44:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-11-26 11:44:23,498 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 39 [2023-11-26 11:44:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:23,499 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-11-26 11:44:23,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 39 states have internal predecessors, (112), 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) [2023-11-26 11:44:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-11-26 11:44:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:44:23,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:23,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:23,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:44:23,707 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-11-26 11:44:23,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1758041553, now seen corresponding path program 1 times [2023-11-26 11:44:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343551664] [2023-11-26 11:44:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343551664] [2023-11-26 11:44:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343551664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535216115] [2023-11-26 11:44:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:25,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:25,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:25,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:25,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a30f5bb-48f5-47c7-ae67-a198ea7f2a67/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:44:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:26,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-26 11:44:26,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:26,135 INFO L378 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 [2023-11-26 11:44:26,236 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:44:26,236 INFO L378 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 [2023-11-26 11:44:26,316 INFO L378 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 [2023-11-26 11:44:26,376 INFO L378 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 11 [2023-11-26 11:44:26,420 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 11:44:26,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 11:44:26,578 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-26 11:44:26,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-26 11:44:26,679 INFO L378 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 37 treesize of output 26 [2023-11-26 11:44:26,731 INFO L378 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 37 treesize of output 26 [2023-11-26 11:44:26,751 INFO L378 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 37 treesize of output 26 [2023-11-26 11:44:27,227 INFO L349 Elim1Store]: treesize reduction 20, result has 61.5 percent of original size [2023-11-26 11:44:27,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 64 [2023-11-26 11:44:27,260 INFO L378 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 25 treesize of output 17 [2023-11-26 11:44:27,375 INFO L378 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 76 treesize of output 59 [2023-11-26 11:44:27,398 INFO L378 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 26 treesize of output 21 [2023-11-26 11:44:27,534 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2023-11-26 11:44:27,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 137 [2023-11-26 11:44:27,568 INFO L378 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 54 treesize of output 21 [2023-11-26 11:44:27,747 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-26 11:44:27,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 95 [2023-11-26 11:44:27,765 INFO L349 Elim1Store]: treesize reduction 55, result has 23.6 percent of original size [2023-11-26 11:44:27,765 INFO L378 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 1 case distinctions, treesize of input 31 treesize of output 30 [2023-11-26 11:44:27,790 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-26 11:44:27,790 INFO L378 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 54 treesize of output 34 [2023-11-26 11:44:28,139 INFO L378 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 193 treesize of output 141 [2023-11-26 11:44:28,144 INFO L378 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 152 treesize of output 120 [2023-11-26 11:44:28,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:28,453 INFO L378 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 164 [2023-11-26 11:44:28,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:28,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 68 [2023-11-26 11:44:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:28,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:29,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:29,574 INFO L378 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 101 treesize of output 105 [2023-11-26 11:44:29,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:29,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2023-11-26 11:44:29,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:29,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 416 [2023-11-26 11:44:29,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 242 [2023-11-26 11:44:29,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-26 11:44:29,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-26 11:44:30,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:44:30,070 INFO L378 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 310 treesize of output 270 [2023-11-26 11:44:30,306 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-26 11:44:30,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 1 [2023-11-26 11:44:31,117 INFO L378 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 83 treesize of output 59 [2023-11-26 11:44:31,123 INFO L378 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 69 treesize of output 49