./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:54:40,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:54:40,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:54:40,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:54:40,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:54:40,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:54:40,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:54:40,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:54:40,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:54:40,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:54:40,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:54:40,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:54:40,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:54:40,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:54:40,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:54:40,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:54:40,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:54:40,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:54:40,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:54:40,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:54:40,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:54:40,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:54:40,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:54:40,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:54:40,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:54:40,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:54:40,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:54:40,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:54:40,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:54:40,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:54:40,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:54:40,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:54:40,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:54:40,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:54:40,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:54:40,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:54:40,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:54:40,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:54:40,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:54:40,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:54:40,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:54:40,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 16:54:40,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:54:40,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:54:40,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:54:40,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:54:40,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:54:40,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:54:40,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:54:40,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:54:40,254 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:54:40,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:54:40,256 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:54:40,256 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:54:40,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:54:40,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:54:40,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:54:40,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 16:54:40,258 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 16:54:40,258 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 16:54:40,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:54:40,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 16:54:40,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:54:40,259 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:54:40,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:54:40,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:54:40,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:54:40,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:54:40,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:54:40,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:54:40,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:54:40,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:54:40,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:54:40,263 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:54:40,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:54:40,264 INFO L138 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_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2022-11-25 16:54:40,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:54:40,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:54:40,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:54:40,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:54:40,622 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:54:40,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-11-25 16:54:43,998 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:54:44,335 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:54:44,336 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-11-25 16:54:44,363 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/data/f3decdc10/2103556b000a433a9a7a3fa44948a46f/FLAG8199d5136 [2022-11-25 16:54:44,383 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/data/f3decdc10/2103556b000a433a9a7a3fa44948a46f [2022-11-25 16:54:44,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:54:44,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:54:44,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:54:44,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:54:44,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:54:44,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:44,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5cc5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44, skipping insertion in model container [2022-11-25 16:54:44,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:44,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:54:44,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:54:44,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:54:44,828 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:54:44,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:54:44,907 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:54:44,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44 WrapperNode [2022-11-25 16:54:44,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:54:44,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:54:44,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:54:44,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:54:44,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:44,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:44,990 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-25 16:54:44,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:54:44,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:54:44,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:54:44,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:54:45,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:54:45,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:54:45,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:54:45,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:54:45,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (1/1) ... [2022-11-25 16:54:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:54:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:45,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:54:45,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:54:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:54:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:54:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:54:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:54:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:54:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:54:45,299 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:54:45,303 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:54:45,546 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:54:45,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:54:45,554 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 16:54:45,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:54:45 BoogieIcfgContainer [2022-11-25 16:54:45,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:54:45,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:54:45,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:54:45,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:54:45,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:54:44" (1/3) ... [2022-11-25 16:54:45,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4489a985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:54:45, skipping insertion in model container [2022-11-25 16:54:45,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:54:44" (2/3) ... [2022-11-25 16:54:45,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4489a985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:54:45, skipping insertion in model container [2022-11-25 16:54:45,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:54:45" (3/3) ... [2022-11-25 16:54:45,569 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2022-11-25 16:54:45,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:54:45,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-25 16:54:45,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:54:45,681 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;@3d20fe5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:54:45,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-25 16:54:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 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) [2022-11-25 16:54:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 16:54:45,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:45,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:54:45,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-25 16:54:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:45,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971100750] [2022-11-25 16:54:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971100750] [2022-11-25 16:54:46,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971100750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:46,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:46,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:54:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742615729] [2022-11-25 16:54:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:54:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:54:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:46,261 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:46,338 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-25 16:54:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:54:46,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-11-25 16:54:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:46,356 INFO L225 Difference]: With dead ends: 58 [2022-11-25 16:54:46,356 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 16:54:46,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:46,365 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:46,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 16:54:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-11-25 16:54:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-25 16:54:46,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-11-25 16:54:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:46,420 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-25 16:54:46,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-25 16:54:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 16:54:46,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:46,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:54:46,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:54:46,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-11-25 16:54:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911015473] [2022-11-25 16:54:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:46,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911015473] [2022-11-25 16:54:46,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911015473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:46,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:46,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:54:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782617462] [2022-11-25 16:54:46,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:54:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:54:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:54:46,522 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:46,564 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-11-25 16:54:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:54:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-25 16:54:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:46,567 INFO L225 Difference]: With dead ends: 31 [2022-11-25 16:54:46,567 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 16:54:46,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:54:46,572 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:46,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 16:54:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 16:54:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-25 16:54:46,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-11-25 16:54:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:46,588 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-25 16:54:46,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-25 16:54:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 16:54:46,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:46,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:54:46,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:54:46,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-11-25 16:54:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222727487] [2022-11-25 16:54:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:46,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222727487] [2022-11-25 16:54:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222727487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:46,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:54:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756156589] [2022-11-25 16:54:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:54:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:54:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:46,964 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:47,030 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-25 16:54:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:54:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-11-25 16:54:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:47,032 INFO L225 Difference]: With dead ends: 50 [2022-11-25 16:54:47,032 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 16:54:47,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:47,034 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:47,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 16:54:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-11-25 16:54:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-25 16:54:47,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2022-11-25 16:54:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:47,041 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-25 16:54:47,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-25 16:54:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 16:54:47,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:47,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:54:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:54:47,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-25 16:54:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833784316] [2022-11-25 16:54:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:47,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:47,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833784316] [2022-11-25 16:54:47,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833784316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:47,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:47,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:54:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523024130] [2022-11-25 16:54:47,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:54:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:54:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:54:47,275 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:47,416 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-25 16:54:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:54:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2022-11-25 16:54:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:47,417 INFO L225 Difference]: With dead ends: 56 [2022-11-25 16:54:47,417 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 16:54:47,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:54:47,419 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 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 [2022-11-25 16:54:47,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 16:54:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-11-25 16:54:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 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) [2022-11-25 16:54:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-25 16:54:47,425 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-25 16:54:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:47,425 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-25 16:54:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-25 16:54:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 16:54:47,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:47,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:54:47,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:54:47,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-11-25 16:54:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204681869] [2022-11-25 16:54:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:47,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:47,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204681869] [2022-11-25 16:54:47,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204681869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:47,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:47,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:54:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732525460] [2022-11-25 16:54:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:47,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:54:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:54:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:54:47,613 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:47,798 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-25 16:54:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:54:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2022-11-25 16:54:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:47,803 INFO L225 Difference]: With dead ends: 55 [2022-11-25 16:54:47,803 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 16:54:47,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:54:47,810 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:47,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 45 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 16:54:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2022-11-25 16:54:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 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) [2022-11-25 16:54:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-25 16:54:47,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-25 16:54:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:47,824 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-25 16:54:47,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-25 16:54:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 16:54:47,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:47,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:47,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:54:47,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-11-25 16:54:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917063818] [2022-11-25 16:54:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917063818] [2022-11-25 16:54:47,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917063818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:47,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:47,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:54:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333946946] [2022-11-25 16:54:47,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:47,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:54:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:54:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:47,885 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-25 16:54:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:47,924 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-25 16:54:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:54:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-11-25 16:54:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:47,925 INFO L225 Difference]: With dead ends: 31 [2022-11-25 16:54:47,926 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 16:54:47,926 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 [2022-11-25 16:54:47,927 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:47,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 16:54:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 16:54:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-25 16:54:47,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2022-11-25 16:54:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:47,931 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-25 16:54:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-25 16:54:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-25 16:54:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 16:54:47,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:47,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:54:47,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-11-25 16:54:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286121506] [2022-11-25 16:54:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:47,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:48,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:48,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286121506] [2022-11-25 16:54:48,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286121506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:48,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:48,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:54:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042303599] [2022-11-25 16:54:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:48,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:54:48,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:54:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:54:48,154 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-25 16:54:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:48,261 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-25 16:54:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:54:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2022-11-25 16:54:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:48,262 INFO L225 Difference]: With dead ends: 42 [2022-11-25 16:54:48,262 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 16:54:48,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:54:48,268 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:48,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 16:54:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-11-25 16:54:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.375) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-25 16:54:48,280 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 8 [2022-11-25 16:54:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:48,280 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-25 16:54:48,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-25 16:54:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-25 16:54:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:54:48,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:48,281 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:54:48,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-25 16:54:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99490941] [2022-11-25 16:54:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99490941] [2022-11-25 16:54:48,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99490941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070770076] [2022-11-25 16:54:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:48,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:48,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:54:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:54:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:48,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 16:54:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:48,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:49,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070770076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:49,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:49,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-25 16:54:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275418023] [2022-11-25 16:54:49,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:54:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:54:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:54:49,228 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:49,570 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-25 16:54:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:54:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 16:54:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:49,571 INFO L225 Difference]: With dead ends: 86 [2022-11-25 16:54:49,571 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 16:54:49,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-25 16:54:49,572 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 250 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:49,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 131 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:54:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 16:54:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 36. [2022-11-25 16:54:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-25 16:54:49,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 10 [2022-11-25 16:54:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:49,577 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-25 16:54:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-25 16:54:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:54:49,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:49,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:49,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:54:49,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:49,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556842, now seen corresponding path program 1 times [2022-11-25 16:54:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990494623] [2022-11-25 16:54:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990494623] [2022-11-25 16:54:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990494623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:50,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:50,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:54:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323272795] [2022-11-25 16:54:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:54:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:54:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:54:50,048 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:50,085 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-25 16:54:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:54:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2022-11-25 16:54:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:50,086 INFO L225 Difference]: With dead ends: 35 [2022-11-25 16:54:50,086 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 16:54:50,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:54:50,089 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:50,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 16:54:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-25 16:54:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 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) [2022-11-25 16:54:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-25 16:54:50,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2022-11-25 16:54:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:50,094 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-25 16:54:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-25 16:54:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 16:54:50,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:50,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:54:50,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2022-11-25 16:54:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035452904] [2022-11-25 16:54:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035452904] [2022-11-25 16:54:50,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035452904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:50,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:50,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:54:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805140468] [2022-11-25 16:54:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:54:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:54:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:54:50,125 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:50,133 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-25 16:54:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:54:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 16:54:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:50,134 INFO L225 Difference]: With dead ends: 35 [2022-11-25 16:54:50,134 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 16:54:50,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:54:50,135 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:50,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 16:54:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-25 16:54:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-25 16:54:50,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-11-25 16:54:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:50,143 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-25 16:54:50,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-25 16:54:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 16:54:50,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:50,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:54:50,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2022-11-25 16:54:50,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:50,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685055418] [2022-11-25 16:54:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685055418] [2022-11-25 16:54:50,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685055418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:50,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:50,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 16:54:50,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967503599] [2022-11-25 16:54:50,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:54:50,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:54:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:54:50,358 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-25 16:54:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:50,483 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-25 16:54:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:54:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 14 [2022-11-25 16:54:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:50,484 INFO L225 Difference]: With dead ends: 46 [2022-11-25 16:54:50,484 INFO L226 Difference]: Without dead ends: 46 [2022-11-25 16:54:50,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:54:50,485 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:50,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-25 16:54:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-25 16:54:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-25 16:54:50,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 14 [2022-11-25 16:54:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:50,496 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-25 16:54:50,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-25 16:54:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-25 16:54:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 16:54:50,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:50,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:54:50,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2022-11-25 16:54:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145055396] [2022-11-25 16:54:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145055396] [2022-11-25 16:54:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145055396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:50,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:50,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:54:50,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254285521] [2022-11-25 16:54:50,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:54:50,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:54:50,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:54:50,725 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-25 16:54:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:50,912 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-25 16:54:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:54:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2022-11-25 16:54:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:50,913 INFO L225 Difference]: With dead ends: 55 [2022-11-25 16:54:50,913 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 16:54:50,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:54:50,914 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:50,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 98 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 16:54:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-11-25 16:54:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-25 16:54:50,918 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2022-11-25 16:54:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:50,918 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-25 16:54:50,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-25 16:54:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-25 16:54:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 16:54:50,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:50,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:54:50,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -782696489, now seen corresponding path program 1 times [2022-11-25 16:54:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277887856] [2022-11-25 16:54:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:50,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277887856] [2022-11-25 16:54:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277887856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:50,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:50,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:54:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602152119] [2022-11-25 16:54:50,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:54:50,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:54:50,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:50,998 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:51,015 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-25 16:54:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:54:51,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 16:54:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:51,016 INFO L225 Difference]: With dead ends: 40 [2022-11-25 16:54:51,016 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 16:54:51,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:54:51,017 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:51,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 16:54:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 16:54:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-25 16:54:51,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2022-11-25 16:54:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:51,021 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-25 16:54:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-25 16:54:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 16:54:51,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:51,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:54:51,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2022-11-25 16:54:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286051581] [2022-11-25 16:54:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286051581] [2022-11-25 16:54:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286051581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831006718] [2022-11-25 16:54:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:51,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:51,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:51,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:54:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 16:54:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:51,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:51,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:54:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:51,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831006718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:51,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:51,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 16:54:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274823815] [2022-11-25 16:54:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:54:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:54:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:54:51,562 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:51,731 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-25 16:54:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:54:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 16:54:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:51,732 INFO L225 Difference]: With dead ends: 37 [2022-11-25 16:54:51,732 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 16:54:51,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:54:51,733 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 175 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:51,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 57 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:54:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 16:54:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-11-25 16:54:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2022-11-25 16:54:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-25 16:54:51,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-25 16:54:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:51,736 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-25 16:54:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-25 16:54:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 16:54:51,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:51,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:51,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:51,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2022-11-25 16:54:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:51,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482295729] [2022-11-25 16:54:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482295729] [2022-11-25 16:54:52,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482295729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054828365] [2022-11-25 16:54:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:54:52,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:52,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:52,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:54:52,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:54:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 16:54:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:52,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:54:52,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:54:52,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 16:54:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:52,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:54:53,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:54:53,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:54:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054828365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:53,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 16:54:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418437216] [2022-11-25 16:54:53,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 16:54:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 16:54:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-11-25 16:54:53,474 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:54,776 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-25 16:54:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:54:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 16:54:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:54,778 INFO L225 Difference]: With dead ends: 54 [2022-11-25 16:54:54,778 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 16:54:54,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 16:54:54,780 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:54,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 140 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:54:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 16:54:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-11-25 16:54:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-25 16:54:54,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-11-25 16:54:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:54,783 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-25 16:54:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-25 16:54:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 16:54:54,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:54,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:54,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:54,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:54:54,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2022-11-25 16:54:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:54,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618695344] [2022-11-25 16:54:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:55,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618695344] [2022-11-25 16:54:55,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618695344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:55,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573144674] [2022-11-25 16:54:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:54:55,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:55,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:55,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:55,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:54:55,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 16:54:55,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:55,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 16:54:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:55,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:54:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:55,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:56,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:54:56,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:54:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573144674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:56,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-25 16:54:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682907734] [2022-11-25 16:54:56,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:56,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 16:54:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 16:54:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:54:56,222 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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) [2022-11-25 16:54:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:56,623 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-11-25 16:54:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:54:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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) Word has length 34 [2022-11-25 16:54:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:56,624 INFO L225 Difference]: With dead ends: 59 [2022-11-25 16:54:56,624 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 16:54:56,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 16:54:56,625 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 166 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:54:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 16:54:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-25 16:54:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-25 16:54:56,628 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-11-25 16:54:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:56,628 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-25 16:54:56,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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) [2022-11-25 16:54:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-25 16:54:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 16:54:56,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:56,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:56,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:54:56,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2022-11-25 16:54:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283019344] [2022-11-25 16:54:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:57,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283019344] [2022-11-25 16:54:57,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283019344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:57,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125239214] [2022-11-25 16:54:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:54:57,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:57,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:54:57,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:54:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:54:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:57,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:54:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:57,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:57,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125239214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:57,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:57,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-25 16:54:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599054283] [2022-11-25 16:54:57,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:57,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 16:54:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 16:54:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-25 16:54:57,993 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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) [2022-11-25 16:54:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:58,285 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-11-25 16:54:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:54:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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 38 [2022-11-25 16:54:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:58,286 INFO L225 Difference]: With dead ends: 50 [2022-11-25 16:54:58,286 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 16:54:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 16:54:58,287 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 291 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 140 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:54:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 16:54:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-11-25 16:54:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-25 16:54:58,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-11-25 16:54:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:58,291 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-25 16:54:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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) [2022-11-25 16:54:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-25 16:54:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 16:54:58,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:58,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:58,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:58,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:54:58,498 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:54:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2022-11-25 16:54:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895566518] [2022-11-25 16:54:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:59,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895566518] [2022-11-25 16:54:59,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895566518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:59,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220620036] [2022-11-25 16:54:59,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:54:59,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:59,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:59,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:54:59,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 16:54:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 16:54:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:59,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:54:59,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:54:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:59,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:59,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:54:59,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:54:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:54:59,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220620036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:59,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:59,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-11-25 16:54:59,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436875367] [2022-11-25 16:54:59,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:59,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:54:59,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:54:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-11-25 16:54:59,971 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:00,552 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-11-25 16:55:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:55:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 44 [2022-11-25 16:55:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:00,553 INFO L225 Difference]: With dead ends: 75 [2022-11-25 16:55:00,553 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 16:55:00,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:55:00,555 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:00,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 192 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:55:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 16:55:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-11-25 16:55:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2022-11-25 16:55:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-25 16:55:00,557 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-11-25 16:55:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:00,558 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-25 16:55:00,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-25 16:55:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 16:55:00,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:00,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:00,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 16:55:00,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2022-11-25 16:55:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:00,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220259536] [2022-11-25 16:55:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220259536] [2022-11-25 16:55:01,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220259536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693717273] [2022-11-25 16:55:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:55:01,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:01,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:01,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:01,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:55:01,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 16:55:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 16:55:01,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:01,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:01,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 16:55:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:02,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693717273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:02,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:02,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-11-25 16:55:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345798330] [2022-11-25 16:55:02,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:02,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 16:55:02,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 16:55:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-11-25 16:55:02,056 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:02,425 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-25 16:55:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:55:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 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 48 [2022-11-25 16:55:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:02,427 INFO L225 Difference]: With dead ends: 60 [2022-11-25 16:55:02,427 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 16:55:02,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 16:55:02,429 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 258 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:02,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 151 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:55:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 16:55:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-11-25 16:55:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-25 16:55:02,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2022-11-25 16:55:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:02,439 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-25 16:55:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-25 16:55:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 16:55:02,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:02,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:02,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:02,648 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2022-11-25 16:55:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727900198] [2022-11-25 16:55:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727900198] [2022-11-25 16:55:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727900198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70677713] [2022-11-25 16:55:03,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:55:03,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:03,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:03,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:55:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 16:55:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:03,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:55:04,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:55:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:04,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:04,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:55:04,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:55:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70677713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:05,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:05,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-11-25 16:55:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48190071] [2022-11-25 16:55:05,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:05,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 16:55:05,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 16:55:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 16:55:05,099 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:05,973 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-25 16:55:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:55:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 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 54 [2022-11-25 16:55:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:05,975 INFO L225 Difference]: With dead ends: 91 [2022-11-25 16:55:05,975 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 16:55:05,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 16:55:05,977 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:05,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 343 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:55:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 16:55:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-25 16:55:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-25 16:55:05,987 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-11-25 16:55:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:05,988 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-25 16:55:05,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-25 16:55:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 16:55:05,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:05,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:06,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:06,200 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2022-11-25 16:55:06,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:06,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783543852] [2022-11-25 16:55:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:06,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783543852] [2022-11-25 16:55:06,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783543852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939898946] [2022-11-25 16:55:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:55:06,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:06,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:06,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:06,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:55:06,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:55:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 16:55:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:07,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:55:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939898946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:08,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:08,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-11-25 16:55:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417409470] [2022-11-25 16:55:08,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 16:55:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 16:55:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-25 16:55:08,090 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:08,698 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-25 16:55:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:55:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-25 16:55:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:08,700 INFO L225 Difference]: With dead ends: 70 [2022-11-25 16:55:08,700 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 16:55:08,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 16:55:08,702 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 374 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:08,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 256 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:55:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 16:55:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-25 16:55:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-25 16:55:08,705 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2022-11-25 16:55:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:08,705 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-25 16:55:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-25 16:55:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 16:55:08,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:08,706 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:08,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:08,907 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2022-11-25 16:55:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050413992] [2022-11-25 16:55:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:09,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050413992] [2022-11-25 16:55:09,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050413992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63333862] [2022-11-25 16:55:09,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:55:09,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:09,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:09,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:10,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:55:10,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 16:55:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 16:55:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:10,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:55:10,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:55:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:10,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:11,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:55:11,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:55:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:11,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63333862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:11,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:11,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-11-25 16:55:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924288498] [2022-11-25 16:55:11,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:11,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 16:55:11,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 16:55:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 16:55:11,427 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2022-11-25 16:55:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:12,586 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2022-11-25 16:55:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 16:55:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) Word has length 64 [2022-11-25 16:55:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:12,591 INFO L225 Difference]: With dead ends: 107 [2022-11-25 16:55:12,591 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 16:55:12,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 16:55:12,593 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:12,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 452 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 16:55:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 16:55:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-25 16:55:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-25 16:55:12,597 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-11-25 16:55:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:12,598 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-25 16:55:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 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) [2022-11-25 16:55:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-25 16:55:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 16:55:12,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:12,600 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:12,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:12,808 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2022-11-25 16:55:12,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:12,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612652192] [2022-11-25 16:55:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:13,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:13,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612652192] [2022-11-25 16:55:13,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612652192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:13,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488696627] [2022-11-25 16:55:13,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:55:13,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:13,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:13,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:55:13,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:55:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:13,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 16:55:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:13,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:55:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:14,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:14,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488696627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:14,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:14,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-11-25 16:55:14,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130948671] [2022-11-25 16:55:14,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:14,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 16:55:14,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 16:55:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 16:55:14,981 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:15,683 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-25 16:55:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:55:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 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 68 [2022-11-25 16:55:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:15,685 INFO L225 Difference]: With dead ends: 80 [2022-11-25 16:55:15,685 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 16:55:15,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 16:55:15,686 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 372 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:15,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 369 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:55:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 16:55:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-11-25 16:55:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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) [2022-11-25 16:55:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-25 16:55:15,689 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2022-11-25 16:55:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:15,689 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-25 16:55:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-25 16:55:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 16:55:15,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:15,690 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:15,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:15,901 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2022-11-25 16:55:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079814043] [2022-11-25 16:55:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079814043] [2022-11-25 16:55:17,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079814043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301058404] [2022-11-25 16:55:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:55:17,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:17,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:55:17,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 16:55:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 16:55:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:17,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:55:17,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:55:18,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:18,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 16:55:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:20,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:55:20,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:55:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:21,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301058404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:21,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:21,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-11-25 16:55:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036493623] [2022-11-25 16:55:21,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:21,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-25 16:55:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-25 16:55:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 16:55:21,087 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:25,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:55:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:40,455 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2022-11-25 16:55:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 16:55:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 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 74 [2022-11-25 16:55:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:40,458 INFO L225 Difference]: With dead ends: 134 [2022-11-25 16:55:40,458 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 16:55:40,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=1162, Invalid=6669, Unknown=1, NotChecked=0, Total=7832 [2022-11-25 16:55:40,460 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 644 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:40,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 815 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1510 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 16:55:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 16:55:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2022-11-25 16:55:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-25 16:55:40,463 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 74 [2022-11-25 16:55:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:40,463 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-25 16:55:40,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-25 16:55:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 16:55:40,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:40,464 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:40,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 16:55:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 16:55:40,670 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2078674125, now seen corresponding path program 12 times [2022-11-25 16:55:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764810110] [2022-11-25 16:55:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764810110] [2022-11-25 16:55:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764810110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503603306] [2022-11-25 16:55:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:55:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:41,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:41,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:55:41,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 16:55:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 16:55:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:42,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:55:42,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:55:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:42,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:55:42,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:55:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:42,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503603306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:42,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:42,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-11-25 16:55:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829269951] [2022-11-25 16:55:42,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:42,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 16:55:42,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 16:55:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 16:55:42,808 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:44,172 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-11-25 16:55:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 16:55:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 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 84 [2022-11-25 16:55:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:44,174 INFO L225 Difference]: With dead ends: 139 [2022-11-25 16:55:44,174 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 16:55:44,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=2991, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 16:55:44,176 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 253 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:44,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 826 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:55:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 16:55:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-25 16:55:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-25 16:55:44,179 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-11-25 16:55:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:44,179 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-25 16:55:44,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-25 16:55:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 16:55:44,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:44,181 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:44,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 16:55:44,387 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -53373744, now seen corresponding path program 13 times [2022-11-25 16:55:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521655161] [2022-11-25 16:55:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521655161] [2022-11-25 16:55:45,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521655161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729048070] [2022-11-25 16:55:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:55:45,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:45,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:55:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 16:55:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:46,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:46,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:55:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:46,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729048070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:46,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:46,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2022-11-25 16:55:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453069783] [2022-11-25 16:55:46,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:46,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 16:55:46,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 16:55:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 16:55:46,809 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:47,761 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-11-25 16:55:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 16:55:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 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 88 [2022-11-25 16:55:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:47,762 INFO L225 Difference]: With dead ends: 100 [2022-11-25 16:55:47,762 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 16:55:47,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 16:55:47,764 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 456 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:47,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 564 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 16:55:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 16:55:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-11-25 16:55:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-11-25 16:55:47,767 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2022-11-25 16:55:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:47,767 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-11-25 16:55:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-11-25 16:55:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 16:55:47,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:47,768 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:47,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:47,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:55:47,969 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:55:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 14 times [2022-11-25 16:55:47,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:47,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541934854] [2022-11-25 16:55:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541934854] [2022-11-25 16:55:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541934854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:55:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629038782] [2022-11-25 16:55:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:55:49,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:49,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:49,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:55:49,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:55:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 16:55:49,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:49,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:55:51,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:55:51,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 16:55:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:51,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:53,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:55:53,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:55:53,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:55:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629038782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:53,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:55:53,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2022-11-25 16:55:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689826607] [2022-11-25 16:55:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-25 16:55:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-25 16:55:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 16:55:53,522 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:59,914 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-11-25 16:55:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 16:55:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 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 94 [2022-11-25 16:55:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:59,915 INFO L225 Difference]: With dead ends: 166 [2022-11-25 16:55:59,915 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 16:55:59,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1128, Invalid=7992, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 16:55:59,919 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 751 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:59,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1227 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 16:55:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 16:55:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-25 16:55:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 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) [2022-11-25 16:55:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-11-25 16:55:59,923 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2022-11-25 16:55:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:59,923 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-11-25 16:55:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-11-25 16:55:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 16:55:59,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:59,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:59,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:00,131 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:56:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 15 times [2022-11-25 16:56:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126085812] [2022-11-25 16:56:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126085812] [2022-11-25 16:56:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126085812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117740415] [2022-11-25 16:56:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:56:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:01,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:01,465 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:01,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:56:01,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 16:56:01,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-25 16:56:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:02,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:56:02,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:56:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:02,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:02,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:56:02,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:56:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:02,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117740415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:02,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:56:02,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-11-25 16:56:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854129505] [2022-11-25 16:56:02,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 16:56:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 16:56:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 16:56:02,964 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:04,884 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-11-25 16:56:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 16:56:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 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 104 [2022-11-25 16:56:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:04,886 INFO L225 Difference]: With dead ends: 171 [2022-11-25 16:56:04,886 INFO L226 Difference]: Without dead ends: 112 [2022-11-25 16:56:04,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2022-11-25 16:56:04,887 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 382 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:04,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1256 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:56:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-25 16:56:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-25 16:56:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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) [2022-11-25 16:56:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-11-25 16:56:04,891 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-11-25 16:56:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:04,891 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-11-25 16:56:04,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-11-25 16:56:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 16:56:04,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:04,892 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:04,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:05,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:56:05,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:56:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -631787522, now seen corresponding path program 16 times [2022-11-25 16:56:05,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:05,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585571440] [2022-11-25 16:56:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585571440] [2022-11-25 16:56:06,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585571440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035529647] [2022-11-25 16:56:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:56:06,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:06,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:06,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:56:06,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:56:06,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:06,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 16:56:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:06,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:56:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:07,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:08,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035529647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:08,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:56:08,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 62 [2022-11-25 16:56:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862892180] [2022-11-25 16:56:08,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-25 16:56:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-25 16:56:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 16:56:08,676 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:10,134 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-11-25 16:56:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 16:56:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-25 16:56:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:10,136 INFO L225 Difference]: With dead ends: 120 [2022-11-25 16:56:10,136 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 16:56:10,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1137, Invalid=4715, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 16:56:10,138 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 850 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:10,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 794 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:56:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 16:56:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-11-25 16:56:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-11-25 16:56:10,142 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2022-11-25 16:56:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:10,143 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-11-25 16:56:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-11-25 16:56:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 16:56:10,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:10,144 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:10,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 16:56:10,350 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:56:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 17 times [2022-11-25 16:56:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360661785] [2022-11-25 16:56:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360661785] [2022-11-25 16:56:11,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360661785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969584654] [2022-11-25 16:56:11,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:56:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:11,790 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:11,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 16:56:12,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-25 16:56:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-25 16:56:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:12,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:56:12,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:56:14,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:14,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-25 16:56:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:14,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:56:16,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:56:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:18,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969584654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:18,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:56:18,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-11-25 16:56:18,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496183072] [2022-11-25 16:56:18,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 16:56:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 16:56:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=6243, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 16:56:18,779 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:35,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:56:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:48,854 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-11-25 16:56:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 16:56:48,855 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 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 114 [2022-11-25 16:56:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:48,855 INFO L225 Difference]: With dead ends: 198 [2022-11-25 16:56:48,855 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 16:56:48,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=1961, Invalid=11845, Unknown=0, NotChecked=0, Total=13806 [2022-11-25 16:56:48,857 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1193 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 2906 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2906 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:48,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 1739 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2906 Invalid, 10 Unknown, 0 Unchecked, 10.0s Time] [2022-11-25 16:56:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 16:56:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2022-11-25 16:56:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-11-25 16:56:48,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2022-11-25 16:56:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:48,861 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-11-25 16:56:48,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-11-25 16:56:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-25 16:56:48,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:48,862 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:48,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:49,067 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:56:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 18 times [2022-11-25 16:56:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:49,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794226209] [2022-11-25 16:56:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794226209] [2022-11-25 16:56:50,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794226209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272847616] [2022-11-25 16:56:50,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:56:50,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:50,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:50,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 16:56:51,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-25 16:56:51,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-25 16:56:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:51,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:56:52,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:56:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:52,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:52,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:56:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:56:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:52,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272847616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:52,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:56:52,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-11-25 16:56:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356912384] [2022-11-25 16:56:52,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:52,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 16:56:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 16:56:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 16:56:52,647 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:55,210 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-11-25 16:56:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 16:56:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 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 124 [2022-11-25 16:56:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:55,211 INFO L225 Difference]: With dead ends: 203 [2022-11-25 16:56:55,211 INFO L226 Difference]: Without dead ends: 132 [2022-11-25 16:56:55,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 16:56:55,213 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 380 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:55,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1497 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 16:56:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-25 16:56:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-11-25 16:56:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-11-25 16:56:55,216 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-11-25 16:56:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:55,217 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-11-25 16:56:55,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:56:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-11-25 16:56:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 16:56:55,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:55,218 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:55,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:55,425 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:56:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 19 times [2022-11-25 16:56:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692913832] [2022-11-25 16:56:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:56,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692913832] [2022-11-25 16:56:56,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692913832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050293843] [2022-11-25 16:56:56,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:56:56,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:56,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:56,766 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:56,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 16:56:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 16:56:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:58,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:56:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:56:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050293843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:58,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:56:58,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2022-11-25 16:56:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530370178] [2022-11-25 16:56:58,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-25 16:56:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-25 16:56:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 16:56:58,998 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:00,389 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-11-25 16:57:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 16:57:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 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 128 [2022-11-25 16:57:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:00,390 INFO L225 Difference]: With dead ends: 140 [2022-11-25 16:57:00,391 INFO L226 Difference]: Without dead ends: 140 [2022-11-25 16:57:00,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 211 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1059, Invalid=4641, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 16:57:00,395 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 627 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:00,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 951 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:57:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-25 16:57:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-11-25 16:57:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-25 16:57:00,401 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2022-11-25 16:57:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:00,402 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-25 16:57:00,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-25 16:57:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 16:57:00,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:00,403 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:00,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:00,607 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:57:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 20 times [2022-11-25 16:57:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:00,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959424671] [2022-11-25 16:57:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:00,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959424671] [2022-11-25 16:57:02,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959424671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540616351] [2022-11-25 16:57:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:57:02,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:02,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:02,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 16:57:02,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:57:02,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 16:57:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:02,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:05,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:05,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 16:57:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:05,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:08,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:57:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:57:08,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:57:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:08,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540616351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:08,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:57:08,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 84 [2022-11-25 16:57:08,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837795713] [2022-11-25 16:57:08,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:08,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-25 16:57:08,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-25 16:57:08,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 16:57:08,682 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:19,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:57:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:22,572 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2022-11-25 16:57:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 16:57:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 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 134 [2022-11-25 16:57:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:22,573 INFO L225 Difference]: With dead ends: 230 [2022-11-25 16:57:22,573 INFO L226 Difference]: Without dead ends: 153 [2022-11-25 16:57:22,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 204 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1766, Invalid=13486, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 16:57:22,574 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 865 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 3874 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 3880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:22,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 2325 Invalid, 3880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3874 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-25 16:57:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-25 16:57:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-11-25 16:57:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-25 16:57:22,584 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 134 [2022-11-25 16:57:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:22,584 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-25 16:57:22,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-25 16:57:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-25 16:57:22,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:22,586 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:22,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:22,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 16:57:22,786 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:57:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2022-11-25 16:57:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872392654] [2022-11-25 16:57:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:22,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:24,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:24,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872392654] [2022-11-25 16:57:24,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872392654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:24,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600712349] [2022-11-25 16:57:24,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:57:24,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:24,572 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 16:57:25,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-25 16:57:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 16:57:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:25,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:26,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:57:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:26,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:26,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:57:26,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:57:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:26,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600712349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:26,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:57:26,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-11-25 16:57:26,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487559514] [2022-11-25 16:57:26,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:26,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-25 16:57:26,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-25 16:57:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 16:57:26,683 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:29,862 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2022-11-25 16:57:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 16:57:29,862 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 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 144 [2022-11-25 16:57:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:29,863 INFO L225 Difference]: With dead ends: 235 [2022-11-25 16:57:29,863 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 16:57:29,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 263 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=471, Invalid=7185, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 16:57:29,865 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 448 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:29,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2175 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 16:57:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 16:57:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-11-25 16:57:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-25 16:57:29,869 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-11-25 16:57:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:29,869 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-25 16:57:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-25 16:57:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-25 16:57:29,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:29,871 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:29,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 16:57:30,078 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:57:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2022-11-25 16:57:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646828490] [2022-11-25 16:57:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:31,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646828490] [2022-11-25 16:57:31,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646828490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:31,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787767285] [2022-11-25 16:57:31,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:57:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:31,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:31,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 16:57:31,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:57:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 16:57:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:31,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:57:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:32,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787767285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:57:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 82 [2022-11-25 16:57:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740598955] [2022-11-25 16:57:34,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 16:57:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 16:57:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=5919, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 16:57:34,796 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:36,752 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-11-25 16:57:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 16:57:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 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 148 [2022-11-25 16:57:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:36,754 INFO L225 Difference]: With dead ends: 160 [2022-11-25 16:57:36,754 INFO L226 Difference]: Without dead ends: 160 [2022-11-25 16:57:36,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1953, Invalid=8147, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 16:57:36,755 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1009 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:36,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 1454 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 16:57:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-25 16:57:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-11-25 16:57:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-11-25 16:57:36,758 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2022-11-25 16:57:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:36,758 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-11-25 16:57:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-11-25 16:57:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-25 16:57:36,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:36,759 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:36,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 16:57:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 16:57:36,963 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:57:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2022-11-25 16:57:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:36,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079501003] [2022-11-25 16:57:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:38,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079501003] [2022-11-25 16:57:38,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079501003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497920306] [2022-11-25 16:57:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:57:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:38,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 16:57:39,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-25 16:57:39,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-25 16:57:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:39,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:57:40,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:48,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:48,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-25 16:57:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 695 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:51,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:57:51,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:57:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:55,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497920306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:55,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:57:55,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2022-11-25 16:57:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131944641] [2022-11-25 16:57:55,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-25 16:57:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-25 16:57:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=10412, Unknown=3, NotChecked=0, Total=11342 [2022-11-25 16:57:55,088 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:30,962 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2022-11-25 16:58:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 16:58:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 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 154 [2022-11-25 16:58:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:30,963 INFO L225 Difference]: With dead ends: 262 [2022-11-25 16:58:30,964 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 16:58:30,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=3081, Invalid=19266, Unknown=3, NotChecked=0, Total=22350 [2022-11-25 16:58:30,967 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1470 mSDsluCounter, 3184 mSDsCounter, 0 mSdLazyCounter, 5359 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 5366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5359 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:30,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 3248 Invalid, 5366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5359 Invalid, 6 Unknown, 0 Unchecked, 9.1s Time] [2022-11-25 16:58:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 16:58:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2022-11-25 16:58:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-11-25 16:58:30,971 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 154 [2022-11-25 16:58:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:30,971 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-11-25 16:58:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-11-25 16:58:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-25 16:58:30,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:30,973 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:30,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-25 16:58:31,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:31,179 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:58:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 24 times [2022-11-25 16:58:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066858434] [2022-11-25 16:58:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066858434] [2022-11-25 16:58:33,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066858434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7315194] [2022-11-25 16:58:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:58:33,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:33,091 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:33,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 16:58:33,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-25 16:58:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-25 16:58:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:34,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:58:35,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:58:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:35,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:35,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:58:35,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:58:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7315194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:35,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:35,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2022-11-25 16:58:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435039291] [2022-11-25 16:58:35,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-25 16:58:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-25 16:58:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 16:58:35,717 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:39,548 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2022-11-25 16:58:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 16:58:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 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 164 [2022-11-25 16:58:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:39,552 INFO L225 Difference]: With dead ends: 267 [2022-11-25 16:58:39,552 INFO L226 Difference]: Without dead ends: 172 [2022-11-25 16:58:39,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 16:58:39,554 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 515 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:39,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2581 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 16:58:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-25 16:58:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-11-25 16:58:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-11-25 16:58:39,558 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-11-25 16:58:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:39,559 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-11-25 16:58:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-11-25 16:58:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-25 16:58:39,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:39,560 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:39,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 16:58:39,772 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:58:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 25 times [2022-11-25 16:58:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:39,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778250034] [2022-11-25 16:58:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:41,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778250034] [2022-11-25 16:58:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778250034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470133451] [2022-11-25 16:58:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:58:41,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:41,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:41,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 16:58:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 16:58:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:44,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 16:58:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:44,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470133451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:44,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:44,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2022-11-25 16:58:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914252101] [2022-11-25 16:58:44,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:44,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-25 16:58:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-25 16:58:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 16:58:44,654 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:46,789 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-25 16:58:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 16:58:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 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 168 [2022-11-25 16:58:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:46,790 INFO L225 Difference]: With dead ends: 180 [2022-11-25 16:58:46,791 INFO L226 Difference]: Without dead ends: 180 [2022-11-25 16:58:46,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 279 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1677, Invalid=7443, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 16:58:46,792 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1243 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:46,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 1652 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 16:58:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-25 16:58:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-11-25 16:58:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-11-25 16:58:46,797 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2022-11-25 16:58:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:46,797 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-11-25 16:58:46,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-11-25 16:58:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-25 16:58:46,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:46,799 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:46,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-25 16:58:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 16:58:47,003 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:58:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 26 times [2022-11-25 16:58:47,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:47,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211178270] [2022-11-25 16:58:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:49,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211178270] [2022-11-25 16:58:49,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211178270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:49,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779793820] [2022-11-25 16:58:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:58:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:49,284 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:49,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 16:58:49,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:58:49,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:58:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-25 16:58:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:50,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:58:53,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:58:53,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 16:58:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:54,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:58:57,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 16:58:57,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-25 16:58:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:58,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779793820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:58,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:58,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 104 [2022-11-25 16:58:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849032760] [2022-11-25 16:58:58,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:58,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-25 16:58:58,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-25 16:58:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=9988, Unknown=0, NotChecked=0, Total=10712 [2022-11-25 16:58:58,411 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:02,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:59:05,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:59:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:16,442 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2022-11-25 16:59:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-25 16:59:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 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 174 [2022-11-25 16:59:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:16,444 INFO L225 Difference]: With dead ends: 294 [2022-11-25 16:59:16,444 INFO L226 Difference]: Without dead ends: 193 [2022-11-25 16:59:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 268 SyntacticMatches, 17 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3800 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=2548, Invalid=20404, Unknown=0, NotChecked=0, Total=22952 [2022-11-25 16:59:16,447 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1984 mSDsluCounter, 3675 mSDsCounter, 0 mSdLazyCounter, 5904 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 3747 SdHoareTripleChecker+Invalid, 5918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5904 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:16,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1984 Valid, 3747 Invalid, 5918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5904 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2022-11-25 16:59:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-25 16:59:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2022-11-25 16:59:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-11-25 16:59:16,452 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2022-11-25 16:59:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:16,452 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-11-25 16:59:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-11-25 16:59:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-25 16:59:16,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:16,454 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:16,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:16,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 16:59:16,659 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:59:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 27 times [2022-11-25 16:59:16,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:16,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204043749] [2022-11-25 16:59:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:16,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204043749] [2022-11-25 16:59:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204043749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391310840] [2022-11-25 16:59:18,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:59:18,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:18,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:18,990 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 16:59:19,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-25 16:59:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-25 16:59:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:20,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:59:21,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:59:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:21,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:21,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:59:21,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:59:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:21,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391310840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:21,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:21,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 69 [2022-11-25 16:59:21,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467376547] [2022-11-25 16:59:21,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:21,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 16:59:21,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 16:59:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 16:59:21,948 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:26,943 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2022-11-25 16:59:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 16:59:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 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 184 [2022-11-25 16:59:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:26,944 INFO L225 Difference]: With dead ends: 299 [2022-11-25 16:59:26,944 INFO L226 Difference]: Without dead ends: 192 [2022-11-25 16:59:26,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 339 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=575, Invalid=10981, Unknown=0, NotChecked=0, Total=11556 [2022-11-25 16:59:26,946 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 572 mSDsluCounter, 3351 mSDsCounter, 0 mSdLazyCounter, 5500 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 5517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:26,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 3424 Invalid, 5517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5500 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 16:59:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-25 16:59:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-11-25 16:59:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-11-25 16:59:26,951 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-11-25 16:59:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:26,951 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-11-25 16:59:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-11-25 16:59:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-25 16:59:26,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:26,953 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:26,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:27,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 16:59:27,160 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:59:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2146904906, now seen corresponding path program 28 times [2022-11-25 16:59:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808815458] [2022-11-25 16:59:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:29,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808815458] [2022-11-25 16:59:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808815458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374753916] [2022-11-25 16:59:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:59:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:29,023 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:29,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 16:59:29,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:59:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-25 16:59:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:29,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:59:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:31,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:34,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374753916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:34,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:34,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-11-25 16:59:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832508588] [2022-11-25 16:59:34,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:34,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 16:59:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:34,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 16:59:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=8673, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 16:59:34,456 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:37,003 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-11-25 16:59:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 16:59:37,004 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 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 188 [2022-11-25 16:59:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:37,005 INFO L225 Difference]: With dead ends: 200 [2022-11-25 16:59:37,005 INFO L226 Difference]: Without dead ends: 200 [2022-11-25 16:59:37,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3037, Invalid=11969, Unknown=0, NotChecked=0, Total=15006 [2022-11-25 16:59:37,007 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 627 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:37,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1866 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 16:59:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-25 16:59:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-11-25 16:59:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-11-25 16:59:37,012 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 188 [2022-11-25 16:59:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:37,013 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-11-25 16:59:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-11-25 16:59:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-25 16:59:37,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:37,015 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:37,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:37,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:37,222 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 16:59:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2015965194, now seen corresponding path program 29 times [2022-11-25 16:59:37,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090193362] [2022-11-25 16:59:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:37,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090193362] [2022-11-25 16:59:39,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090193362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424169298] [2022-11-25 16:59:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:59:39,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:39,787 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:39,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 16:59:40,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-25 16:59:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:40,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-25 16:59:40,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:40,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:59:41,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:59:45,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:45,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-25 16:59:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:45,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:49,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 16:59:49,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 16:59:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:53,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424169298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:53,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:53,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 131 [2022-11-25 16:59:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359835479] [2022-11-25 16:59:53,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:53,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-25 16:59:53,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-25 16:59:53,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=15643, Unknown=0, NotChecked=0, Total=17030 [2022-11-25 16:59:53,860 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:00:20,573 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2022-11-25 17:00:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 17:00:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 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 194 [2022-11-25 17:00:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:00:20,575 INFO L225 Difference]: With dead ends: 326 [2022-11-25 17:00:20,575 INFO L226 Difference]: Without dead ends: 213 [2022-11-25 17:00:20,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4698 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=4457, Invalid=28485, Unknown=0, NotChecked=0, Total=32942 [2022-11-25 17:00:20,577 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2688 mSDsluCounter, 4717 mSDsCounter, 0 mSdLazyCounter, 7779 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2688 SdHoareTripleChecker+Valid, 4797 SdHoareTripleChecker+Invalid, 7784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7779 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:00:20,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2688 Valid, 4797 Invalid, 7784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7779 Invalid, 4 Unknown, 0 Unchecked, 7.7s Time] [2022-11-25 17:00:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-25 17:00:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2022-11-25 17:00:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-11-25 17:00:20,582 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 194 [2022-11-25 17:00:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:00:20,582 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-11-25 17:00:20,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-11-25 17:00:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-25 17:00:20,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:00:20,584 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:20,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-25 17:00:20,791 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:00:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 275169505, now seen corresponding path program 30 times [2022-11-25 17:00:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291715615] [2022-11-25 17:00:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:20,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291715615] [2022-11-25 17:00:23,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291715615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404476040] [2022-11-25 17:00:23,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:00:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:23,632 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:23,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:00:25,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-25 17:00:25,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-25 17:00:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:26,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:00:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:27,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:00:27,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:00:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404476040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:27,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:27,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 77 [2022-11-25 17:00:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430789100] [2022-11-25 17:00:27,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-25 17:00:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-25 17:00:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5653, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 17:00:27,612 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:00:33,406 INFO L93 Difference]: Finished difference Result 331 states and 332 transitions. [2022-11-25 17:00:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-25 17:00:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-11-25 17:00:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:00:33,409 INFO L225 Difference]: With dead ends: 331 [2022-11-25 17:00:33,409 INFO L226 Difference]: Without dead ends: 212 [2022-11-25 17:00:33,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 375 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=638, Invalid=13642, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 17:00:33,410 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 516 mSDsluCounter, 4015 mSDsCounter, 0 mSdLazyCounter, 6703 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 4096 SdHoareTripleChecker+Invalid, 6722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:00:33,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 4096 Invalid, 6722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6703 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-25 17:00:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-25 17:00:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2022-11-25 17:00:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-11-25 17:00:33,414 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2022-11-25 17:00:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:00:33,415 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-11-25 17:00:33,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-11-25 17:00:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 17:00:33,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:00:33,417 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:33,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:33,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 17:00:33,625 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:00:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash -998454300, now seen corresponding path program 31 times [2022-11-25 17:00:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:33,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919245113] [2022-11-25 17:00:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:35,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919245113] [2022-11-25 17:00:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919245113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584110707] [2022-11-25 17:00:35,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:00:35,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:35,840 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:35,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:00:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-25 17:00:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:37,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:39,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:00:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:40,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584110707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:40,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:40,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2022-11-25 17:00:40,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025355820] [2022-11-25 17:00:40,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-25 17:00:40,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-25 17:00:40,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=7356, Unknown=0, NotChecked=0, Total=8372 [2022-11-25 17:00:40,092 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:00:42,955 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2022-11-25 17:00:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:00:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 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 208 [2022-11-25 17:00:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:00:42,957 INFO L225 Difference]: With dead ends: 220 [2022-11-25 17:00:42,957 INFO L226 Difference]: Without dead ends: 220 [2022-11-25 17:00:42,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 347 SyntacticMatches, 21 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2439, Invalid=10901, Unknown=0, NotChecked=0, Total=13340 [2022-11-25 17:00:42,958 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1374 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:00:42,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 2174 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 17:00:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-25 17:00:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-11-25 17:00:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-11-25 17:00:42,963 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2022-11-25 17:00:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:00:42,963 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-11-25 17:00:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-11-25 17:00:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-25 17:00:42,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:00:42,965 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:42,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:43,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:43,171 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:00:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -18445128, now seen corresponding path program 32 times [2022-11-25 17:00:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:43,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063694520] [2022-11-25 17:00:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:46,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063694520] [2022-11-25 17:00:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063694520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569942946] [2022-11-25 17:00:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:46,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:46,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:00:46,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:00:46,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-25 17:00:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:47,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:00:52,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:52,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 17:00:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:52,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:57,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:00:57,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 17:00:57,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-25 17:00:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:58,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569942946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:58,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:58,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 124 [2022-11-25 17:00:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246075010] [2022-11-25 17:00:58,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-25 17:00:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-25 17:00:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1006, Invalid=14246, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 17:00:58,475 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:06,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:01:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:18,542 INFO L93 Difference]: Finished difference Result 358 states and 359 transitions. [2022-11-25 17:01:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 17:01:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 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 214 [2022-11-25 17:01:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:18,543 INFO L225 Difference]: With dead ends: 358 [2022-11-25 17:01:18,543 INFO L226 Difference]: Without dead ends: 233 [2022-11-25 17:01:18,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 332 SyntacticMatches, 21 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5424 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=3474, Invalid=28746, Unknown=0, NotChecked=0, Total=32220 [2022-11-25 17:01:18,545 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 2005 mSDsluCounter, 5510 mSDsCounter, 0 mSdLazyCounter, 8730 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 5598 SdHoareTripleChecker+Invalid, 8748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 8730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:18,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2005 Valid, 5598 Invalid, 8748 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [18 Valid, 8730 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-25 17:01:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-25 17:01:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2022-11-25 17:01:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-11-25 17:01:18,550 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 214 [2022-11-25 17:01:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:18,550 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-11-25 17:01:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-11-25 17:01:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-25 17:01:18,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:18,552 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:18,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:18,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:18,759 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:01:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2008611953, now seen corresponding path program 33 times [2022-11-25 17:01:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248644916] [2022-11-25 17:01:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248644916] [2022-11-25 17:01:21,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248644916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611276111] [2022-11-25 17:01:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:21,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:21,934 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:01:23,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 17:01:23,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-25 17:01:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:25,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:01:25,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:01:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:25,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:25,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:01:25,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:01:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611276111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:26,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 81 [2022-11-25 17:01:26,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457234603] [2022-11-25 17:01:26,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-25 17:01:26,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-25 17:01:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6275, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 17:01:26,329 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:33,012 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2022-11-25 17:01:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 17:01:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 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 224 [2022-11-25 17:01:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:33,014 INFO L225 Difference]: With dead ends: 363 [2022-11-25 17:01:33,014 INFO L226 Difference]: Without dead ends: 232 [2022-11-25 17:01:33,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=679, Invalid=15577, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 17:01:33,016 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 838 mSDsluCounter, 5064 mSDsCounter, 0 mSdLazyCounter, 8100 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 8121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 8100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:33,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 5153 Invalid, 8121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 8100 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 17:01:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-25 17:01:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-11-25 17:01:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-11-25 17:01:33,021 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-11-25 17:01:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:33,022 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-11-25 17:01:33,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-11-25 17:01:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-25 17:01:33,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:33,024 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:33,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 17:01:33,232 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:01:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash 229928722, now seen corresponding path program 34 times [2022-11-25 17:01:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:33,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072615159] [2022-11-25 17:01:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072615159] [2022-11-25 17:01:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072615159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765984071] [2022-11-25 17:01:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:01:36,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:36,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:36,259 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:36,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:01:37,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:01:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-25 17:01:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:37,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:39,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765984071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:43,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 120 [2022-11-25 17:01:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653176440] [2022-11-25 17:01:43,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-11-25 17:01:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-11-25 17:01:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=12475, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 17:01:43,707 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:47,642 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2022-11-25 17:01:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 17:01:47,643 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 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 228 [2022-11-25 17:01:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:47,644 INFO L225 Difference]: With dead ends: 240 [2022-11-25 17:01:47,644 INFO L226 Difference]: Without dead ends: 240 [2022-11-25 17:01:47,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5958 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4313, Invalid=17149, Unknown=0, NotChecked=0, Total=21462 [2022-11-25 17:01:47,647 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1199 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 4362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:47,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 2674 Invalid, 4362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 17:01:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-25 17:01:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2022-11-25 17:01:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-11-25 17:01:47,651 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 228 [2022-11-25 17:01:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:47,652 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-11-25 17:01:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-11-25 17:01:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-25 17:01:47,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:47,654 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:47,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:47,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 17:01:47,862 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:01:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1542886758, now seen corresponding path program 35 times [2022-11-25 17:01:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:47,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997931256] [2022-11-25 17:01:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:47,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:51,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997931256] [2022-11-25 17:01:51,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997931256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425012065] [2022-11-25 17:01:51,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:01:51,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:51,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:51,347 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:51,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:01:51,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-25 17:01:51,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-25 17:01:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:52,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:53,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:01:57,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:57,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-25 17:01:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:58,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:03,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:02:03,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:02:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:08,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425012065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:08,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:08,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 155 [2022-11-25 17:02:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359939317] [2022-11-25 17:02:08,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:08,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-11-25 17:02:08,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-11-25 17:02:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1943, Invalid=21927, Unknown=0, NotChecked=0, Total=23870 [2022-11-25 17:02:08,993 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:02:56,322 INFO L93 Difference]: Finished difference Result 390 states and 391 transitions. [2022-11-25 17:02:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-25 17:02:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 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 234 [2022-11-25 17:02:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:02:56,324 INFO L225 Difference]: With dead ends: 390 [2022-11-25 17:02:56,324 INFO L226 Difference]: Without dead ends: 253 [2022-11-25 17:02:56,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=6089, Invalid=39493, Unknown=0, NotChecked=0, Total=45582 [2022-11-25 17:02:56,326 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1627 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 10182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 6523 SdHoareTripleChecker+Invalid, 10183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:02:56,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1627 Valid, 6523 Invalid, 10183 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10182 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-25 17:02:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-25 17:02:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2022-11-25 17:02:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2022-11-25 17:02:56,329 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 234 [2022-11-25 17:02:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:02:56,330 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2022-11-25 17:02:56,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2022-11-25 17:02:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-25 17:02:56,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:02:56,332 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:02:56,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 17:02:56,540 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:02:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1261679165, now seen corresponding path program 36 times [2022-11-25 17:02:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545180863] [2022-11-25 17:02:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:00,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545180863] [2022-11-25 17:03:00,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545180863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:00,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076539789] [2022-11-25 17:03:00,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:03:00,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:00,015 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:00,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:03:02,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-25 17:03:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-25 17:03:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:04,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:03:04,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:03:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:04,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:05,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:03:05,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:03:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:05,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076539789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:05,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:05,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 87 [2022-11-25 17:03:05,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736403729] [2022-11-25 17:03:05,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:05,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-25 17:03:05,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-25 17:03:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=7263, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 17:03:05,558 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:03:13,090 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2022-11-25 17:03:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 17:03:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 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 244 [2022-11-25 17:03:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:03:13,091 INFO L225 Difference]: With dead ends: 395 [2022-11-25 17:03:13,091 INFO L226 Difference]: Without dead ends: 252 [2022-11-25 17:03:13,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=731, Invalid=18175, Unknown=0, NotChecked=0, Total=18906 [2022-11-25 17:03:13,093 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 906 mSDsluCounter, 5457 mSDsCounter, 0 mSdLazyCounter, 8767 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 5554 SdHoareTripleChecker+Invalid, 8790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 8767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:03:13,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 5554 Invalid, 8790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 8767 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 17:03:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-25 17:03:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-11-25 17:03:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-11-25 17:03:13,098 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2022-11-25 17:03:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:03:13,098 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-11-25 17:03:13,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-11-25 17:03:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-25 17:03:13,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:03:13,100 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:13,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-25 17:03:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:13,303 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:03:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash 956513856, now seen corresponding path program 37 times [2022-11-25 17:03:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935438586] [2022-11-25 17:03:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:13,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935438586] [2022-11-25 17:03:16,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935438586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567526597] [2022-11-25 17:03:16,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:03:16,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:16,951 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:16,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:03:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-25 17:03:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:21,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:03:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:22,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567526597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:22,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:22,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 107 [2022-11-25 17:03:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33657058] [2022-11-25 17:03:22,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-25 17:03:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-25 17:03:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=10152, Unknown=0, NotChecked=0, Total=11556 [2022-11-25 17:03:22,746 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:03:27,105 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2022-11-25 17:03:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 17:03:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 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 248 [2022-11-25 17:03:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:03:27,107 INFO L225 Difference]: With dead ends: 260 [2022-11-25 17:03:27,107 INFO L226 Difference]: Without dead ends: 260 [2022-11-25 17:03:27,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 415 SyntacticMatches, 25 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6829 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3345, Invalid=15015, Unknown=0, NotChecked=0, Total=18360 [2022-11-25 17:03:27,108 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1130 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 4753 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3003 SdHoareTripleChecker+Invalid, 4754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:03:27,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 3003 Invalid, 4754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4753 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 17:03:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-25 17:03:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 255. [2022-11-25 17:03:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2022-11-25 17:03:27,112 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 248 [2022-11-25 17:03:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:03:27,112 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2022-11-25 17:03:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2022-11-25 17:03:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-25 17:03:27,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:03:27,114 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:27,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:27,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:27,322 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:03:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 838164, now seen corresponding path program 38 times [2022-11-25 17:03:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230639144] [2022-11-25 17:03:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:27,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230639144] [2022-11-25 17:03:31,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230639144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690202474] [2022-11-25 17:03:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:03:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:31,456 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:31,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:03:31,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:03:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:31,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-25 17:03:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:33,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:03:39,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:39,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 17:03:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:39,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:45,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:03:45,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:03:45,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-25 17:03:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:47,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690202474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:47,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:47,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 144 [2022-11-25 17:03:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801157688] [2022-11-25 17:03:47,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-11-25 17:03:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-11-25 17:03:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=19256, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 17:03:47,302 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:54,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:04:00,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:04:18,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:04:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:18,624 INFO L93 Difference]: Finished difference Result 422 states and 423 transitions. [2022-11-25 17:04:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-25 17:04:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 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 254 [2022-11-25 17:04:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:18,627 INFO L225 Difference]: With dead ends: 422 [2022-11-25 17:04:18,627 INFO L226 Difference]: Without dead ends: 273 [2022-11-25 17:04:18,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 396 SyntacticMatches, 25 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=4544, Invalid=38512, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 17:04:18,629 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1421 mSDsluCounter, 7328 mSDsCounter, 0 mSdLazyCounter, 11554 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 7432 SdHoareTripleChecker+Invalid, 11580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 11554 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:18,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 7432 Invalid, 11580 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 11554 Invalid, 1 Unknown, 0 Unchecked, 14.9s Time] [2022-11-25 17:04:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-25 17:04:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 265. [2022-11-25 17:04:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-11-25 17:04:18,633 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 254 [2022-11-25 17:04:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:18,633 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-11-25 17:04:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-11-25 17:04:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-25 17:04:18,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:18,636 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:18,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:18,843 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:04:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1268757269, now seen corresponding path program 39 times [2022-11-25 17:04:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809263812] [2022-11-25 17:04:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:22,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:22,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809263812] [2022-11-25 17:04:22,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809263812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:22,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661463284] [2022-11-25 17:04:22,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:04:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:22,743 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:22,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:04:26,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-25 17:04:26,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 171 conjunts are in the unsatisfiable core [2022-11-25 17:04:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:27,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:04:28,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:04:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:28,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:28,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:04:28,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:04:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661463284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:29,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:29,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 93 [2022-11-25 17:04:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851657760] [2022-11-25 17:04:29,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-25 17:04:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-25 17:04:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8323, Unknown=0, NotChecked=0, Total=8556 [2022-11-25 17:04:29,479 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:38,874 INFO L93 Difference]: Finished difference Result 427 states and 428 transitions. [2022-11-25 17:04:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-25 17:04:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 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 264 [2022-11-25 17:04:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:38,875 INFO L225 Difference]: With dead ends: 427 [2022-11-25 17:04:38,876 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 17:04:38,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=783, Invalid=20973, Unknown=0, NotChecked=0, Total=21756 [2022-11-25 17:04:38,877 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 833 mSDsluCounter, 7218 mSDsCounter, 0 mSdLazyCounter, 11448 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 7323 SdHoareTripleChecker+Invalid, 11473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 11448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:38,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 7323 Invalid, 11473 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 11448 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-25 17:04:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 17:04:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2022-11-25 17:04:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2022-11-25 17:04:38,880 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 264 [2022-11-25 17:04:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:38,881 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2022-11-25 17:04:38,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2022-11-25 17:04:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-25 17:04:38,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:38,882 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:38,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:39,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:39,086 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:04:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416430, now seen corresponding path program 40 times [2022-11-25 17:04:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:39,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071202965] [2022-11-25 17:04:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:39,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1128 proven. 2174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:42,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071202965] [2022-11-25 17:04:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071202965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802505685] [2022-11-25 17:04:42,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:04:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:42,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:42,515 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:42,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:04:44,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:04:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-25 17:04:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:44,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:04:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:46,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:52,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802505685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:52,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:52,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 140 [2022-11-25 17:04:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630952832] [2022-11-25 17:04:52,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-25 17:04:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-25 17:04:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=16965, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 17:04:52,798 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:57,748 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2022-11-25 17:04:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 17:04:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 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 268 [2022-11-25 17:04:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:57,751 INFO L225 Difference]: With dead ends: 280 [2022-11-25 17:04:57,751 INFO L226 Difference]: Without dead ends: 280 [2022-11-25 17:04:57,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8240 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5813, Invalid=23257, Unknown=0, NotChecked=0, Total=29070 [2022-11-25 17:04:57,752 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 2417 mSDsluCounter, 3669 mSDsCounter, 0 mSdLazyCounter, 6012 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2417 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:57,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2417 Valid, 3780 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6012 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-25 17:04:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-25 17:04:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 275. [2022-11-25 17:04:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2022-11-25 17:04:57,757 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 268 [2022-11-25 17:04:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:57,757 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2022-11-25 17:04:57,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2022-11-25 17:04:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-25 17:04:57,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:57,759 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:57,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:57,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:57,963 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:04:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash -388191550, now seen corresponding path program 41 times [2022-11-25 17:04:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:57,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257749767] [2022-11-25 17:04:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:57,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257749767] [2022-11-25 17:05:02,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257749767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:02,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567877635] [2022-11-25 17:05:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:05:02,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:02,291 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:02,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:05:07,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-25 17:05:07,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:05:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 177 conjunts are in the unsatisfiable core [2022-11-25 17:05:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:09,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:05:09,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:05:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:09,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:10,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:05:10,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:05:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:10,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567877635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:10,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:10,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 96 [2022-11-25 17:05:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814321122] [2022-11-25 17:05:10,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:10,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-25 17:05:10,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-25 17:05:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=8880, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 17:05:10,848 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:20,317 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2022-11-25 17:05:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-25 17:05:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 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 274 [2022-11-25 17:05:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:20,319 INFO L225 Difference]: With dead ends: 443 [2022-11-25 17:05:20,319 INFO L226 Difference]: Without dead ends: 282 [2022-11-25 17:05:20,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=809, Invalid=22447, Unknown=0, NotChecked=0, Total=23256 [2022-11-25 17:05:20,321 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 701 mSDsluCounter, 7169 mSDsCounter, 0 mSdLazyCounter, 11486 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 7278 SdHoareTripleChecker+Invalid, 11512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:20,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 7278 Invalid, 11512 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 11486 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-25 17:05:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-25 17:05:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2022-11-25 17:05:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2022-11-25 17:05:20,325 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2022-11-25 17:05:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:20,325 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2022-11-25 17:05:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2022-11-25 17:05:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-25 17:05:20,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:20,327 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:20,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:20,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:20,539 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:05:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1901490299, now seen corresponding path program 42 times [2022-11-25 17:05:20,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:20,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216526807] [2022-11-25 17:05:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:20,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1225 proven. 2339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:23,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:23,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216526807] [2022-11-25 17:05:23,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216526807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:23,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891774399] [2022-11-25 17:05:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:05:23,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:23,931 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:23,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 17:05:29,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-11-25 17:05:29,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:05:29,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-25 17:05:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:33,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:36,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:05:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:37,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891774399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:37,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:37,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59, 59] total 146 [2022-11-25 17:05:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341990024] [2022-11-25 17:05:37,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-25 17:05:37,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-25 17:05:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3301, Invalid=18161, Unknown=0, NotChecked=0, Total=21462 [2022-11-25 17:05:37,656 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:41,271 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2022-11-25 17:05:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 17:05:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 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 278 [2022-11-25 17:05:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:41,274 INFO L225 Difference]: With dead ends: 290 [2022-11-25 17:05:41,274 INFO L226 Difference]: Without dead ends: 290 [2022-11-25 17:05:41,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 439 SyntacticMatches, 28 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12417 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=6139, Invalid=25367, Unknown=0, NotChecked=0, Total=31506 [2022-11-25 17:05:41,276 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1616 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:41,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 2465 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 17:05:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-25 17:05:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 285. [2022-11-25 17:05:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2022-11-25 17:05:41,281 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 278 [2022-11-25 17:05:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:41,281 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2022-11-25 17:05:41,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2022-11-25 17:05:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-25 17:05:41,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:41,283 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:41,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-25 17:05:41,494 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:05:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash 469783449, now seen corresponding path program 43 times [2022-11-25 17:05:41,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:41,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568026831] [2022-11-25 17:05:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:41,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568026831] [2022-11-25 17:05:46,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568026831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823428274] [2022-11-25 17:05:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:05:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:46,248 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:46,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 17:05:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 183 conjunts are in the unsatisfiable core [2022-11-25 17:05:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:48,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:05:49,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:05:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:49,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:49,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:05:49,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:05:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:50,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823428274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:50,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:50,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2022-11-25 17:05:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088373401] [2022-11-25 17:05:50,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-25 17:05:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-25 17:05:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9455, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:05:50,326 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:00,361 INFO L93 Difference]: Finished difference Result 459 states and 460 transitions. [2022-11-25 17:06:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-25 17:06:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 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 284 [2022-11-25 17:06:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:00,363 INFO L225 Difference]: With dead ends: 459 [2022-11-25 17:06:00,363 INFO L226 Difference]: Without dead ends: 292 [2022-11-25 17:06:00,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 529 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=835, Invalid=23971, Unknown=0, NotChecked=0, Total=24806 [2022-11-25 17:06:00,365 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1228 mSDsluCounter, 7664 mSDsCounter, 0 mSdLazyCounter, 12158 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 7777 SdHoareTripleChecker+Invalid, 12185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 12158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:00,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 7777 Invalid, 12185 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 12158 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-25 17:06:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-25 17:06:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2022-11-25 17:06:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-11-25 17:06:00,370 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2022-11-25 17:06:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:00,370 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-11-25 17:06:00,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-11-25 17:06:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-25 17:06:00,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:00,372 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:00,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-25 17:06:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-25 17:06:00,580 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:06:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash 204759196, now seen corresponding path program 44 times [2022-11-25 17:06:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:00,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609359634] [2022-11-25 17:06:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1326 proven. 2510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609359634] [2022-11-25 17:06:04,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609359634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470303675] [2022-11-25 17:06:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:06:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:04,210 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:04,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 17:06:04,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:06:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:06:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-25 17:06:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:06,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:09,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:06:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:11,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470303675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:11,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:06:11,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 123 [2022-11-25 17:06:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836090913] [2022-11-25 17:06:11,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:11,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-25 17:06:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-25 17:06:11,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1856, Invalid=13396, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 17:06:11,009 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:16,124 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2022-11-25 17:06:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 17:06:16,137 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 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 288 [2022-11-25 17:06:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:16,139 INFO L225 Difference]: With dead ends: 300 [2022-11-25 17:06:16,139 INFO L226 Difference]: Without dead ends: 300 [2022-11-25 17:06:16,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 29 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9143 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=4395, Invalid=19785, Unknown=0, NotChecked=0, Total=24180 [2022-11-25 17:06:16,140 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1660 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 6672 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 6673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:16,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 4278 Invalid, 6673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6672 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 17:06:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-25 17:06:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2022-11-25 17:06:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-11-25 17:06:16,144 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 288 [2022-11-25 17:06:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-11-25 17:06:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-11-25 17:06:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-25 17:06:16,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:16,147 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:16,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:16,354 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:06:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2129021072, now seen corresponding path program 45 times [2022-11-25 17:06:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466780385] [2022-11-25 17:06:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466780385] [2022-11-25 17:06:20,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466780385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:20,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573668205] [2022-11-25 17:06:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:06:20,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:20,835 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:20,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 17:06:27,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-25 17:06:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:06:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 187 conjunts are in the unsatisfiable core [2022-11-25 17:06:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:29,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:06:30,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:06:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:30,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:06:30,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:06:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:31,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573668205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:31,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:06:31,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-25 17:06:31,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382176845] [2022-11-25 17:06:31,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:31,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-25 17:06:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-25 17:06:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=10048, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 17:06:31,255 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:42,541 INFO L93 Difference]: Finished difference Result 475 states and 476 transitions. [2022-11-25 17:06:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-25 17:06:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 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 294 [2022-11-25 17:06:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:42,543 INFO L225 Difference]: With dead ends: 475 [2022-11-25 17:06:42,543 INFO L226 Difference]: Without dead ends: 302 [2022-11-25 17:06:42,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 548 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=861, Invalid=25545, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 17:06:42,545 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 924 mSDsluCounter, 8830 mSDsCounter, 0 mSdLazyCounter, 14031 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 8947 SdHoareTripleChecker+Invalid, 14059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 14031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:42,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 8947 Invalid, 14059 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 14031 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 17:06:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-25 17:06:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 299. [2022-11-25 17:06:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-11-25 17:06:42,549 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2022-11-25 17:06:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:42,550 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-11-25 17:06:42,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-11-25 17:06:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-25 17:06:42,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:42,552 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:42,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:42,763 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:06:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 470785203, now seen corresponding path program 46 times [2022-11-25 17:06:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:42,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848670201] [2022-11-25 17:06:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1431 proven. 2687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:46,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848670201] [2022-11-25 17:06:46,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848670201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202167842] [2022-11-25 17:06:46,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:06:46,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:46,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:46,603 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:46,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 17:06:48,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:06:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:06:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 161 conjunts are in the unsatisfiable core [2022-11-25 17:06:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:48,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:06:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:50,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:57,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202167842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:57,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:06:57,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 155 [2022-11-25 17:06:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96500134] [2022-11-25 17:06:57,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-11-25 17:06:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-11-25 17:06:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3396, Invalid=20784, Unknown=0, NotChecked=0, Total=24180 [2022-11-25 17:06:57,805 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:07:03,275 INFO L93 Difference]: Finished difference Result 310 states and 311 transitions. [2022-11-25 17:07:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 17:07:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 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 298 [2022-11-25 17:07:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:07:03,276 INFO L225 Difference]: With dead ends: 310 [2022-11-25 17:07:03,276 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 17:07:03,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=7085, Invalid=28447, Unknown=0, NotChecked=0, Total=35532 [2022-11-25 17:07:03,278 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2477 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 6783 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2477 SdHoareTripleChecker+Valid, 4261 SdHoareTripleChecker+Invalid, 6784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:07:03,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2477 Valid, 4261 Invalid, 6784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6783 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 17:07:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 17:07:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2022-11-25 17:07:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2022-11-25 17:07:03,282 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 298 [2022-11-25 17:07:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:07:03,282 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2022-11-25 17:07:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2022-11-25 17:07:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-25 17:07:03,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:07:03,285 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:03,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:03,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-25 17:07:03,494 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:07:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1220065721, now seen corresponding path program 47 times [2022-11-25 17:07:03,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:03,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94597348] [2022-11-25 17:07:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:03,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:08,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:08,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94597348] [2022-11-25 17:07:08,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94597348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:08,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547791794] [2022-11-25 17:07:08,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:07:08,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:08,452 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:08,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 17:07:09,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-25 17:07:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 195 conjunts are in the unsatisfiable core [2022-11-25 17:07:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:12,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 17:07:12,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:07:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:12,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:13,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 17:07:13,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:07:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547791794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:13,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 105 [2022-11-25 17:07:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216572013] [2022-11-25 17:07:13,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:13,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-25 17:07:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-25 17:07:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10659, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 17:07:13,964 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:07:25,311 INFO L93 Difference]: Finished difference Result 491 states and 492 transitions. [2022-11-25 17:07:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 17:07:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 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 304 [2022-11-25 17:07:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:07:25,312 INFO L225 Difference]: With dead ends: 491 [2022-11-25 17:07:25,312 INFO L226 Difference]: Without dead ends: 312 [2022-11-25 17:07:25,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 567 SyntacticMatches, 3 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=887, Invalid=27169, Unknown=0, NotChecked=0, Total=28056 [2022-11-25 17:07:25,314 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 778 mSDsluCounter, 8982 mSDsCounter, 0 mSdLazyCounter, 14225 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 9103 SdHoareTripleChecker+Invalid, 14254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 14225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:07:25,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 9103 Invalid, 14254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 14225 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-25 17:07:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-25 17:07:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-11-25 17:07:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2022-11-25 17:07:25,318 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 304 [2022-11-25 17:07:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:07:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2022-11-25 17:07:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2022-11-25 17:07:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-25 17:07:25,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:07:25,320 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:25,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-25 17:07:25,530 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-25 17:07:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1874703306, now seen corresponding path program 48 times [2022-11-25 17:07:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:25,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252598066] [2022-11-25 17:07:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 1540 proven. 2870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:30,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:30,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252598066] [2022-11-25 17:07:30,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252598066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:30,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558033004] [2022-11-25 17:07:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:07:30,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:30,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:30,358 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:30,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 17:07:34,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-11-25 17:07:34,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-25 17:07:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:34,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:07:35,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:07:39,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:07:39,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-25 17:07:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 682 proven. 241 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-11-25 17:07:39,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:42,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-25 17:07:42,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 17:07:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 726 proven. 197 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-11-25 17:07:43,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558033004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:43,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:43,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-11-25 17:07:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926024297] [2022-11-25 17:07:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-25 17:07:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-25 17:07:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=6527, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 17:07:43,195 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:07:57,033 INFO L93 Difference]: Finished difference Result 313 states and 314 transitions. [2022-11-25 17:07:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 17:07:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 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 308 [2022-11-25 17:07:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:07:57,034 INFO L225 Difference]: With dead ends: 313 [2022-11-25 17:07:57,034 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 17:07:57,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=5259, Invalid=18303, Unknown=0, NotChecked=0, Total=23562 [2022-11-25 17:07:57,035 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1446 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 5427 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 3756 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 5427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:07:57,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 3756 Invalid, 5519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 5427 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 17:07:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 17:07:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 17:07:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 17:07:57,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 308 [2022-11-25 17:07:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:07:57,037 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 17:07:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 17:07:57,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 17:07:57,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2022-11-25 17:07:57,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-11-25 17:07:57,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-25 17:07:57,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-25 17:07:57,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-11-25 17:07:57,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-11-25 17:07:57,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-11-25 17:07:57,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2022-11-25 17:07:57,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2022-11-25 17:07:57,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2022-11-25 17:07:57,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-25 17:07:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:57,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:57,255 INFO L445 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:57,257 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:07:57,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:07:57 BoogieIcfgContainer [2022-11-25 17:07:57,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:07:57,260 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:07:57,260 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:07:57,260 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:07:57,260 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:54:45" (3/4) ... [2022-11-25 17:07:57,262 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 17:07:57,270 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-25 17:07:57,270 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 17:07:57,270 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 17:07:57,271 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 17:07:57,299 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 17:07:57,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:07:57,300 INFO L158 Benchmark]: Toolchain (without parser) took 792911.93ms. Allocated memory was 153.1MB in the beginning and 736.1MB in the end (delta: 583.0MB). Free memory was 107.3MB in the beginning and 600.8MB in the end (delta: -493.5MB). Peak memory consumption was 91.4MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,300 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 153.1MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:07:57,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 515.04ms. Allocated memory is still 153.1MB. Free memory was 106.9MB in the beginning and 91.4MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.51ms. Allocated memory is still 153.1MB. Free memory was 91.4MB in the beginning and 89.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,301 INFO L158 Benchmark]: Boogie Preprocessor took 63.44ms. Allocated memory is still 153.1MB. Free memory was 89.3MB in the beginning and 87.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,301 INFO L158 Benchmark]: RCFGBuilder took 501.57ms. Allocated memory is still 153.1MB. Free memory was 87.9MB in the beginning and 75.4MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,301 INFO L158 Benchmark]: TraceAbstraction took 791699.42ms. Allocated memory was 153.1MB in the beginning and 736.1MB in the end (delta: 583.0MB). Free memory was 75.0MB in the beginning and 603.9MB in the end (delta: -529.0MB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,302 INFO L158 Benchmark]: Witness Printer took 40.14ms. Allocated memory is still 736.1MB. Free memory was 603.9MB in the beginning and 600.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 17:07:57,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 153.1MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 515.04ms. Allocated memory is still 153.1MB. Free memory was 106.9MB in the beginning and 91.4MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.51ms. Allocated memory is still 153.1MB. Free memory was 91.4MB in the beginning and 89.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.44ms. Allocated memory is still 153.1MB. Free memory was 89.3MB in the beginning and 87.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 501.57ms. Allocated memory is still 153.1MB. Free memory was 87.9MB in the beginning and 75.4MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 791699.42ms. Allocated memory was 153.1MB in the beginning and 736.1MB in the end (delta: 583.0MB). Free memory was 75.0MB in the beginning and 603.9MB in the end (delta: -529.0MB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. * Witness Printer took 40.14ms. Allocated memory is still 736.1MB. Free memory was 603.9MB in the beginning and 600.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 791.6s, OverallIterations: 61, TraceHistogramMax: 30, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 401.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 mSolverCounterUnknown, 45000 SdHoareTripleChecker+Valid, 156.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45000 mSDsluCounter, 141090 SdHoareTripleChecker+Invalid, 140.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 137570 mSDsCounter, 510 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 223269 IncrementalHoareTripleChecker+Invalid, 223805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 510 mSolverCounterUnsat, 3520 mSDtfsCounter, 223269 mSolverCounterSat, 1.2s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19237 GetRequests, 13592 SyntacticMatches, 295 SemanticMatches, 5350 ConstructedPredicates, 0 IntricatePredicates, 34 DeprecatedPredicates, 139012 ImplicationChecksByTransitivity, 443.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=309occurred in iteration=60, InterpolantAutomatonStates: 2457, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 61 MinimizatonAttempts, 393 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 41.0s SatisfiabilityAnalysisTime, 330.5s InterpolantComputationTime, 16007 NumberOfCodeBlocks, 16007 NumberOfCodeBlocksAsserted, 531 NumberOfCheckSat, 23796 ConstructedInterpolants, 1415 QuantifiedInterpolants, 256126 SizeOfPredicates, 584 NumberOfNonLiveVariables, 28361 ConjunctsInSsa, 4782 ConjunctsInUnsatCore, 159 InterpolantComputations, 12 PerfectInterpolantSequences, 51948/228025 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 17:07:57,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce96ebb2-1049-4d88-8e36-51ed54e3be45/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE