./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8 --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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- 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-e04fb08 [2022-11-16 11:19:33,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:19:33,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:19:34,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:19:34,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:19:34,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:19:34,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:19:34,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:19:34,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:19:34,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:19:34,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:19:34,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:19:34,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:19:34,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:19:34,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:19:34,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:19:34,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:19:34,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:19:34,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:19:34,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:19:34,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:19:34,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:19:34,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:19:34,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:19:34,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:19:34,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:19:34,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:19:34,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:19:34,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:19:34,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:19:34,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:19:34,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:19:34,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:19:34,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:19:34,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:19:34,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:19:34,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:19:34,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:19:34,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:19:34,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:19:34,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:19:34,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:19:34,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:19:34,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:19:34,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:19:34,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:19:34,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:19:34,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:19:34,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:19:34,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:19:34,144 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:19:34,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:19:34,145 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:19:34,145 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:19:34,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:19:34,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:19:34,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:19:34,146 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:19:34,146 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:19:34,146 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:19:34,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:19:34,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:19:34,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:19:34,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:19:34,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:19:34,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:19:34,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:19:34,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:19:34,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:19:34,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:19:34,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:19:34,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:19:34,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2022-11-16 11:19:34,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:19:34,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:19:34,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:19:34,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:19:34,406 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:19:34,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2022-11-16 11:19:34,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/data/6f9d4ceda/a2422616e26141c18cfe03a3cbef4a54/FLAGa1a9a2ba8 [2022-11-16 11:19:35,086 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:19:35,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2022-11-16 11:19:35,103 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/data/6f9d4ceda/a2422616e26141c18cfe03a3cbef4a54/FLAGa1a9a2ba8 [2022-11-16 11:19:35,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/data/6f9d4ceda/a2422616e26141c18cfe03a3cbef4a54 [2022-11-16 11:19:35,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:19:35,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:19:35,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:19:35,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:19:35,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:19:35,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:19:35" (1/1) ... [2022-11-16 11:19:35,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2a3eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:35, skipping insertion in model container [2022-11-16 11:19:35,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:19:35" (1/1) ... [2022-11-16 11:19:35,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:19:35,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:19:36,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:19:36,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:19:36,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:19:36,287 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:19:36,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36 WrapperNode [2022-11-16 11:19:36,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:19:36,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:19:36,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:19:36,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:19:36,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,343 INFO L138 Inliner]: procedures = 371, calls = 42, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 170 [2022-11-16 11:19:36,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:19:36,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:19:36,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:19:36,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:19:36,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:19:36,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:19:36,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:19:36,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:19:36,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (1/1) ... [2022-11-16 11:19:36,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:19:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:19:36,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:19:36,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:19:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:19:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:19:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:19:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:19:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 11:19:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 11:19:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:19:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:19:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:19:36,481 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:19:36,720 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:19:36,722 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:19:37,324 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:19:37,334 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:19:37,334 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:19:37,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:19:37 BoogieIcfgContainer [2022-11-16 11:19:37,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:19:37,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:19:37,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:19:37,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:19:37,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:19:35" (1/3) ... [2022-11-16 11:19:37,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bc9474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:19:37, skipping insertion in model container [2022-11-16 11:19:37,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:36" (2/3) ... [2022-11-16 11:19:37,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bc9474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:19:37, skipping insertion in model container [2022-11-16 11:19:37,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:19:37" (3/3) ... [2022-11-16 11:19:37,348 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2022-11-16 11:19:37,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:19:37,374 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 63 error locations. [2022-11-16 11:19:37,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:19:37,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 11:19:37,577 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:19:37,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 283 transitions, 571 flow [2022-11-16 11:19:37,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 283 transitions, 571 flow [2022-11-16 11:19:37,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 283 transitions, 571 flow [2022-11-16 11:19:37,756 INFO L130 PetriNetUnfolder]: 5/282 cut-off events. [2022-11-16 11:19:37,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:19:37,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 282 events. 5/282 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 416 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2022-11-16 11:19:37,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-11-16 11:20:19,994 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 205 DAG size of output: 199 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:20:40,788 WARN L233 SmtUtils]: Spent 9.50s on a formula simplification. DAG size of input: 221 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:20:59,517 WARN L233 SmtUtils]: Spent 14.52s on a formula simplification. DAG size of input: 224 DAG size of output: 212 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:21:04,750 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:21:51,119 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification. DAG size of input: 271 DAG size of output: 269 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:22:07,577 WARN L233 SmtUtils]: Spent 13.13s on a formula simplification. DAG size of input: 280 DAG size of output: 278 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:23:24,505 WARN L233 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 331 DAG size of output: 326 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:23:41,387 WARN L233 SmtUtils]: Spent 16.87s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:24:38,238 WARN L233 SmtUtils]: Spent 56.85s on a formula simplification. DAG size of input: 340 DAG size of output: 332 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:24:55,031 WARN L233 SmtUtils]: Spent 16.78s on a formula simplification that was a NOOP. DAG size: 284 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:25:09,290 WARN L233 SmtUtils]: Spent 14.25s on a formula simplification. DAG size of input: 276 DAG size of output: 274 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:25:30,349 WARN L233 SmtUtils]: Spent 17.38s on a formula simplification. DAG size of input: 285 DAG size of output: 283 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:25:49,945 INFO L134 LiptonReduction]: Checked pairs total: 12698 [2022-11-16 11:25:49,946 INFO L136 LiptonReduction]: Total number of compositions: 415 [2022-11-16 11:25:49,954 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 84 transitions, 173 flow [2022-11-16 11:25:49,985 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 373 states, 226 states have (on average 2.933628318584071) internal successors, (663), 372 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:50,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:25:50,007 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c404f68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:25:50,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2022-11-16 11:25:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 373 states, 226 states have (on average 2.933628318584071) internal successors, (663), 372 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:25:50,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:50,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:25:50,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:25:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 32582, now seen corresponding path program 1 times [2022-11-16 11:25:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:50,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128123529] [2022-11-16 11:25:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:50,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:50,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128123529] [2022-11-16 11:25:50,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128123529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:50,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:50,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:25:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114353899] [2022-11-16 11:25:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:50,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:25:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:25:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:50,421 INFO L87 Difference]: Start difference. First operand has 373 states, 226 states have (on average 2.933628318584071) internal successors, (663), 372 states have internal predecessors, (663), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:51,228 INFO L93 Difference]: Finished difference Result 311 states and 573 transitions. [2022-11-16 11:25:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:25:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-16 11:25:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:51,243 INFO L225 Difference]: With dead ends: 311 [2022-11-16 11:25:51,246 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 11:25:51,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:51,251 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:51,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:25:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 11:25:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-11-16 11:25:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 213 states have (on average 2.6901408450704225) internal successors, (573), 308 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 573 transitions. [2022-11-16 11:25:51,345 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 573 transitions. Word has length 2 [2022-11-16 11:25:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:51,346 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 573 transitions. [2022-11-16 11:25:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 573 transitions. [2022-11-16 11:25:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:25:51,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:51,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:25:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:25:51,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:25:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash 32547, now seen corresponding path program 1 times [2022-11-16 11:25:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:51,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296240114] [2022-11-16 11:25:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:51,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:51,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296240114] [2022-11-16 11:25:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296240114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:51,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:25:51,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562790063] [2022-11-16 11:25:51,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:51,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:25:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:25:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:51,472 INFO L87 Difference]: Start difference. First operand 309 states and 573 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:51,828 INFO L93 Difference]: Finished difference Result 277 states and 511 transitions. [2022-11-16 11:25:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:25:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-16 11:25:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:51,831 INFO L225 Difference]: With dead ends: 277 [2022-11-16 11:25:51,831 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 11:25:51,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:51,833 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:51,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:25:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 11:25:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-16 11:25:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 194 states have (on average 2.634020618556701) internal successors, (511), 276 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 511 transitions. [2022-11-16 11:25:51,848 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 511 transitions. Word has length 2 [2022-11-16 11:25:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:51,848 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 511 transitions. [2022-11-16 11:25:51,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 511 transitions. [2022-11-16 11:25:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:25:51,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:51,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:25:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:25:51,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:25:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 32548, now seen corresponding path program 1 times [2022-11-16 11:25:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:51,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122485970] [2022-11-16 11:25:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122485970] [2022-11-16 11:25:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122485970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:51,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:51,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:25:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852345655] [2022-11-16 11:25:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:25:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:25:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:52,005 INFO L87 Difference]: Start difference. First operand 277 states and 511 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:52,743 INFO L93 Difference]: Finished difference Result 277 states and 510 transitions. [2022-11-16 11:25:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:25:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-16 11:25:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:52,746 INFO L225 Difference]: With dead ends: 277 [2022-11-16 11:25:52,746 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 11:25:52,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:25:52,747 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:52,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:25:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 11:25:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-16 11:25:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 194 states have (on average 2.6288659793814433) internal successors, (510), 276 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 510 transitions. [2022-11-16 11:25:52,760 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 510 transitions. Word has length 2 [2022-11-16 11:25:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:52,761 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 510 transitions. [2022-11-16 11:25:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 510 transitions. [2022-11-16 11:25:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:25:52,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:52,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:25:52,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:25:52,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:25:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1011476, now seen corresponding path program 1 times [2022-11-16 11:25:52,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142728588] [2022-11-16 11:25:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142728588] [2022-11-16 11:25:52,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142728588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966086288] [2022-11-16 11:25:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:52,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:52,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:25:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:53,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:25:53,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:53,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:53,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966086288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:53,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:53,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-16 11:25:53,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489183659] [2022-11-16 11:25:53,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:53,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:25:53,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:25:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:25:53,316 INFO L87 Difference]: Start difference. First operand 277 states and 510 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) 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) [2022-11-16 11:25:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:54,240 INFO L93 Difference]: Finished difference Result 282 states and 516 transitions. [2022-11-16 11:25:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:25:54,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) 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 3 [2022-11-16 11:25:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:54,243 INFO L225 Difference]: With dead ends: 282 [2022-11-16 11:25:54,243 INFO L226 Difference]: Without dead ends: 282 [2022-11-16 11:25:54,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:25:54,244 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:25:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-16 11:25:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2022-11-16 11:25:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 197 states have (on average 2.6192893401015227) internal successors, (516), 279 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 516 transitions. [2022-11-16 11:25:54,254 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 516 transitions. Word has length 3 [2022-11-16 11:25:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:54,255 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 516 transitions. [2022-11-16 11:25:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) 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) [2022-11-16 11:25:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 516 transitions. [2022-11-16 11:25:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:25:54,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:54,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:25:54,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:25:54,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:54,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:25:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1011404, now seen corresponding path program 1 times [2022-11-16 11:25:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:54,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610432313] [2022-11-16 11:25:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:54,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:55,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610432313] [2022-11-16 11:25:55,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610432313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643530270] [2022-11-16 11:25:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:55,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:55,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:25:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:25:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:55,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:55,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:25:55,381 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 11:25:55,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-11-16 11:25:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:55,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:01,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643530270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:01,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:01,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 11:26:01,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618099796] [2022-11-16 11:26:01,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:01,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:26:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:26:01,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:26:01,719 INFO L87 Difference]: Start difference. First operand 280 states and 516 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:02,494 INFO L93 Difference]: Finished difference Result 280 states and 514 transitions. [2022-11-16 11:26:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:26:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:26:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:02,497 INFO L225 Difference]: With dead ends: 280 [2022-11-16 11:26:02,498 INFO L226 Difference]: Without dead ends: 280 [2022-11-16 11:26:02,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:26:02,499 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:02,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-11-16 11:26:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-16 11:26:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-11-16 11:26:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 197 states have (on average 2.6091370558375635) internal successors, (514), 279 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 514 transitions. [2022-11-16 11:26:02,510 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 514 transitions. Word has length 3 [2022-11-16 11:26:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 514 transitions. [2022-11-16 11:26:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 514 transitions. [2022-11-16 11:26:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:26:02,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:02,511 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-16 11:26:02,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:02,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:02,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:26:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash 972036556, now seen corresponding path program 2 times [2022-11-16 11:26:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:02,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32434971] [2022-11-16 11:26:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:02,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32434971] [2022-11-16 11:26:04,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32434971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434350346] [2022-11-16 11:26:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:04,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:26:05,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:26:05,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 11:26:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:05,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:26:05,167 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 11:26:05,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-11-16 11:26:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:26:05,325 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 11:26:05,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 65 [2022-11-16 11:26:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:05,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:26:05,519 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 11:26:05,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 81 [2022-11-16 11:26:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:05,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:21,952 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:26:33,074 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:26:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434350346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:33,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:33,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-16 11:26:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634024735] [2022-11-16 11:26:33,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:26:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:26:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=129, Unknown=1, NotChecked=0, Total=182 [2022-11-16 11:26:33,078 INFO L87 Difference]: Start difference. First operand 280 states and 514 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-11-16 11:26:50,014 WARN L233 SmtUtils]: Spent 14.68s on a formula simplification. DAG size of input: 114 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:26:59,145 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 63 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:26:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:59,293 INFO L93 Difference]: Finished difference Result 283 states and 537 transitions. [2022-11-16 11:26:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:26:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 5 [2022-11-16 11:26:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:59,297 INFO L225 Difference]: With dead ends: 283 [2022-11-16 11:26:59,297 INFO L226 Difference]: Without dead ends: 283 [2022-11-16 11:26:59,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=84, Invalid=186, Unknown=2, NotChecked=0, Total=272 [2022-11-16 11:26:59,298 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-11-16 11:26:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-16 11:26:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-11-16 11:26:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 200 states have (on average 2.685) internal successors, (537), 282 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 537 transitions. [2022-11-16 11:26:59,309 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 537 transitions. Word has length 5 [2022-11-16 11:26:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:59,309 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 537 transitions. [2022-11-16 11:26:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-11-16 11:26:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 537 transitions. [2022-11-16 11:26:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:26:59,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:59,310 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:26:59,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:26:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:59,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:26:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash 68364652, now seen corresponding path program 2 times [2022-11-16 11:26:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:59,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568601316] [2022-11-16 11:26:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:59,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568601316] [2022-11-16 11:26:59,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568601316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106444012] [2022-11-16 11:26:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:59,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:59,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:59,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:27:00,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:27:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:27:00,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:00,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106444012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:00,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:27:00,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:27:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246634945] [2022-11-16 11:27:00,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:00,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:27:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:27:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:27:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:27:00,809 INFO L87 Difference]: Start difference. First operand 283 states and 537 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2022-11-16 11:27:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:02,023 INFO L93 Difference]: Finished difference Result 288 states and 522 transitions. [2022-11-16 11:27:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:27:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 6 [2022-11-16 11:27:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:02,025 INFO L225 Difference]: With dead ends: 288 [2022-11-16 11:27:02,025 INFO L226 Difference]: Without dead ends: 288 [2022-11-16 11:27:02,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:27:02,026 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:02,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:27:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-16 11:27:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 286. [2022-11-16 11:27:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 203 states have (on average 2.5714285714285716) internal successors, (522), 285 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 522 transitions. [2022-11-16 11:27:02,035 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 522 transitions. Word has length 6 [2022-11-16 11:27:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:02,036 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 522 transitions. [2022-11-16 11:27:02,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2022-11-16 11:27:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 522 transitions. [2022-11-16 11:27:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:27:02,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:02,037 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1] [2022-11-16 11:27:02,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:02,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:27:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 837103564, now seen corresponding path program 3 times [2022-11-16 11:27:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:27:02,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372156081] [2022-11-16 11:27:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:02,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:27:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:07,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:27:07,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372156081] [2022-11-16 11:27:07,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372156081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:27:07,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645965155] [2022-11-16 11:27:07,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:27:07,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:07,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:27:07,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:27:07,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:29:34,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:29:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-16 11:29:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:29:34,762 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 11:29:34,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-11-16 11:29:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:34,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:29:34,917 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 11:29:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 65 [2022-11-16 11:29:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 11:29:35,143 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 11:29:35,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 81 [2022-11-16 11:29:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,282 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:29:35,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-16 11:29:35,365 INFO L321 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2022-11-16 11:29:35,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 83 [2022-11-16 11:29:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,488 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:29:35,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-16 11:29:35,529 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-16 11:29:35,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 11:29:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:35,746 INFO L321 Elim1Store]: treesize reduction 33, result has 47.6 percent of original size [2022-11-16 11:29:35,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 91 [2022-11-16 11:29:35,840 INFO L321 Elim1Store]: treesize reduction 78, result has 31.6 percent of original size [2022-11-16 11:29:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 81 [2022-11-16 11:29:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,385 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-16 11:29:36,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 49 [2022-11-16 11:29:36,415 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 11:29:36,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 55 [2022-11-16 11:29:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:36,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:37,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:29:37,287 INFO L321 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2022-11-16 11:29:37,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 88144 treesize of output 87880 [2022-11-16 11:30:20,297 WARN L233 SmtUtils]: Spent 23.69s on a formula simplification. DAG size of input: 243 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:30:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:25,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645965155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:25,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:25,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-16 11:30:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773746541] [2022-11-16 11:30:25,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:30:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:30:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:30:25,150 INFO L87 Difference]: Start difference. First operand 286 states and 522 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:36,105 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification. DAG size of input: 61 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:30:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:37,588 INFO L93 Difference]: Finished difference Result 286 states and 519 transitions. [2022-11-16 11:30:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:30:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:30:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:37,590 INFO L225 Difference]: With dead ends: 286 [2022-11-16 11:30:37,590 INFO L226 Difference]: Without dead ends: 286 [2022-11-16 11:30:37,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:30:37,591 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:37,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 233 Unchecked, 1.7s Time] [2022-11-16 11:30:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-16 11:30:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-11-16 11:30:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 203 states have (on average 2.5566502463054186) internal successors, (519), 285 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 519 transitions. [2022-11-16 11:30:37,600 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 519 transitions. Word has length 9 [2022-11-16 11:30:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:37,600 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 519 transitions. [2022-11-16 11:30:37,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 519 transitions. [2022-11-16 11:30:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:37,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:37,601 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:30:37,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8717345-7485-401f-8d46-3b1be9f4fd7c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:30:37,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 73 more)] === [2022-11-16 11:30:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1574553708, now seen corresponding path program 3 times [2022-11-16 11:30:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:37,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589772820] [2022-11-16 11:30:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat