./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/960521-1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/960521-1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ --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 c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- 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-dbf71c6-m [2022-10-17 10:35:30,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:35:30,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:35:30,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:35:30,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:35:30,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:35:30,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:35:30,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:35:30,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:35:30,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:35:30,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:35:30,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:35:30,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:35:30,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:35:30,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:35:30,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:35:30,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:35:30,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:35:30,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:35:30,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:35:30,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:35:30,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:35:30,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:35:30,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:35:30,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:35:30,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:35:30,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:35:30,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:35:30,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:35:30,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:35:30,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:35:30,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:35:30,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:35:30,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:35:30,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:35:30,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:35:30,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:35:30,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:35:30,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:35:30,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:35:30,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:35:30,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 10:35:30,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:35:30,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:35:30,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:35:30,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:35:30,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:35:30,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:35:30,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:35:30,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:35:30,460 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:35:30,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:35:30,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:35:30,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:35:30,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:35:30,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:35:30,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:35:30,463 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:35:30,463 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:35:30,464 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 10:35:30,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:35:30,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:35:30,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:35:30,465 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:35:30,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:35:30,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:35:30,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:35:30,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:30,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:35:30,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:35:30,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:35:30,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:35:30,467 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_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2022-10-17 10:35:30,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:35:30,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:35:30,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:35:30,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:35:30,770 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:35:30,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/memsafety/960521-1-3.i [2022-10-17 10:35:30,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/data/9d26d70f1/a03aedfc6063460da8505f5c318e4676/FLAG969acad7a [2022-10-17 10:35:31,307 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:35:31,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/sv-benchmarks/c/memsafety/960521-1-3.i [2022-10-17 10:35:31,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/data/9d26d70f1/a03aedfc6063460da8505f5c318e4676/FLAG969acad7a [2022-10-17 10:35:31,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/data/9d26d70f1/a03aedfc6063460da8505f5c318e4676 [2022-10-17 10:35:31,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:35:31,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:35:31,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:31,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:35:31,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:35:31,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@357af079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:31, skipping insertion in model container [2022-10-17 10:35:31,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:35:31" (1/1) ... [2022-10-17 10:35:31,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:35:31,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:35:32,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:32,082 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:35:32,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:35:32,179 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:35:32,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32 WrapperNode [2022-10-17 10:35:32,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:35:32,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:32,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:35:32,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:35:32,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,220 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-10-17 10:35:32,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:35:32,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:35:32,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:35:32,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:35:32,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:35:32,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:35:32,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:35:32,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:35:32,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (1/1) ... [2022-10-17 10:35:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:35:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:32,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:35:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:35:32,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:35:32,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:35:32,431 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:35:32,433 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:35:32,662 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:35:32,667 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:35:32,668 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:35:32,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:32 BoogieIcfgContainer [2022-10-17 10:35:32,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:35:32,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:35:32,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:35:32,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:35:32,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:35:31" (1/3) ... [2022-10-17 10:35:32,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5b831c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:32, skipping insertion in model container [2022-10-17 10:35:32,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:35:32" (2/3) ... [2022-10-17 10:35:32,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5b831c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:35:32, skipping insertion in model container [2022-10-17 10:35:32,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:35:32" (3/3) ... [2022-10-17 10:35:32,701 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2022-10-17 10:35:32,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:35:32,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-10-17 10:35:32,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:35:32,832 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;@45f640c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:35:32,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-10-17 10:35:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 10:35:32,854 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:32,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 10:35:32,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-10-17 10:35:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:32,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364905903] [2022-10-17 10:35:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:33,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364905903] [2022-10-17 10:35:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364905903] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:33,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:35:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579226620] [2022-10-17 10:35:33,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:35:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:35:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,224 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:33,273 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-10-17 10:35:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:35:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 [2022-10-17 10:35:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:33,286 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:35:33,286 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 10:35:33,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,296 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:33,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 10:35:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-17 10:35:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-10-17 10:35:33,341 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2022-10-17 10:35:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:33,341 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-10-17 10:35:33,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-10-17 10:35:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 10:35:33,342 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:33,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 10:35:33,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:35:33,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-10-17 10:35:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:33,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354263484] [2022-10-17 10:35:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:33,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354263484] [2022-10-17 10:35:33,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354263484] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:33,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:35:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295311115] [2022-10-17 10:35:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:35:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:35:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,593 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:33,625 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-10-17 10:35:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:35:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 [2022-10-17 10:35:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:33,627 INFO L225 Difference]: With dead ends: 47 [2022-10-17 10:35:33,627 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 10:35:33,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:35:33,629 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:33,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 10:35:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-17 10:35:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-10-17 10:35:33,636 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2022-10-17 10:35:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:33,637 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-10-17 10:35:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-10-17 10:35:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:35:33,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:33,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:35:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:35:33,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2022-10-17 10:35:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550025792] [2022-10-17 10:35:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:33,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550025792] [2022-10-17 10:35:33,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550025792] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:33,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:33,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:35:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032394986] [2022-10-17 10:35:33,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:33,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:35:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:35:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:35:33,763 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:33,840 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-10-17 10:35:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:35:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:35:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:33,842 INFO L225 Difference]: With dead ends: 44 [2022-10-17 10:35:33,842 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:35:33,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:35:33,846 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:33,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:35:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-17 10:35:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-10-17 10:35:33,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2022-10-17 10:35:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:33,860 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-10-17 10:35:33,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-10-17 10:35:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:35:33,861 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:33,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:35:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:35:33,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2022-10-17 10:35:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459079678] [2022-10-17 10:35:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:33,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:34,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459079678] [2022-10-17 10:35:34,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459079678] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:34,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:34,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:35:34,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374572380] [2022-10-17 10:35:34,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:34,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:35:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:35:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:35:34,049 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:34,164 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-10-17 10:35:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:35:34,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:35:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:34,167 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:35:34,167 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 10:35:34,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:35:34,178 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:34,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 10:35:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-10-17 10:35:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-10-17 10:35:34,188 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2022-10-17 10:35:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:34,189 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-10-17 10:35:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-10-17 10:35:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:35:34,190 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:34,190 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:34,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:35:34,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2022-10-17 10:35:34,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743066805] [2022-10-17 10:35:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:34,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743066805] [2022-10-17 10:35:34,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743066805] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:34,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67659317] [2022-10-17 10:35:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:34,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:34,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:34,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:35:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:35:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:35:34,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-17 10:35:34,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 10:35:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:34,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:34,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67659317] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:34,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:34,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-10-17 10:35:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172888964] [2022-10-17 10:35:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:35:34,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:35:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:35:34,855 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:35,120 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-10-17 10:35:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:35:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:35:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:35,131 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:35:35,131 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:35:35,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:35:35,133 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:35,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 101 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:35:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:35:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2022-10-17 10:35:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-10-17 10:35:35,151 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2022-10-17 10:35:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:35,153 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-10-17 10:35:35,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-10-17 10:35:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:35,154 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:35,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:35,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:35,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:35,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2022-10-17 10:35:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:35,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737457294] [2022-10-17 10:35:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:35:35,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:35,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737457294] [2022-10-17 10:35:35,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737457294] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:35,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:35:35,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:35:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392639269] [2022-10-17 10:35:35,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:35,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:35:35,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:35:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:35:35,439 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:35,479 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-17 10:35:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:35:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:35:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:35,481 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:35:35,481 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:35:35,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:35:35,482 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:35,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:35:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-10-17 10:35:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-10-17 10:35:35,499 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2022-10-17 10:35:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:35,499 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-10-17 10:35:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-10-17 10:35:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:35:35,500 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:35,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:35:35,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2022-10-17 10:35:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:35,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920275197] [2022-10-17 10:35:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920275197] [2022-10-17 10:35:35,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920275197] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550296341] [2022-10-17 10:35:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:35,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:35,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:35,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:35:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:35:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:35,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:35,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550296341] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:35,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:35,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:35:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092021228] [2022-10-17 10:35:35,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:35:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:35:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:35:35,721 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:35,802 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2022-10-17 10:35:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:35:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:35:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:35,804 INFO L225 Difference]: With dead ends: 87 [2022-10-17 10:35:35,804 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 10:35:35,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:35:35,806 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:35,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:35:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 10:35:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-10-17 10:35:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-10-17 10:35:35,821 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 11 [2022-10-17 10:35:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:35,822 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-10-17 10:35:35,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-10-17 10:35:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:35:35,823 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:35,823 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2022-10-17 10:35:35,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:35:36,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2022-10-17 10:35:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713779551] [2022-10-17 10:35:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713779551] [2022-10-17 10:35:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713779551] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149756057] [2022-10-17 10:35:36,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:35:36,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:36,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:36,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:35:36,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:35:36,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:35:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:35:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:36,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:35:36,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-17 10:35:36,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 10:35:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:36,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149756057] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:37,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:37,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-10-17 10:35:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909524981] [2022-10-17 10:35:37,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:37,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:35:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:35:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:35:37,247 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:37,752 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-10-17 10:35:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:35:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-17 10:35:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:37,754 INFO L225 Difference]: With dead ends: 184 [2022-10-17 10:35:37,754 INFO L226 Difference]: Without dead ends: 184 [2022-10-17 10:35:37,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:35:37,756 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1077 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:37,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:35:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-10-17 10:35:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 59. [2022-10-17 10:35:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-10-17 10:35:37,760 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 18 [2022-10-17 10:35:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:37,760 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-10-17 10:35:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-10-17 10:35:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:35:37,761 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:37,761 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:37,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:37,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:35:37,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2022-10-17 10:35:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910286962] [2022-10-17 10:35:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:37,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:35:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910286962] [2022-10-17 10:35:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910286962] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775800715] [2022-10-17 10:35:38,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:35:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:38,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:38,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:35:38,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:35:38,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:35:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:35:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:38,227 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:35:38,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:35:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-17 10:35:38,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:38,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775800715] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:38,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:35:38,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-10-17 10:35:38,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967677307] [2022-10-17 10:35:38,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:38,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:35:38,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:35:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:35:38,333 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:38,358 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-10-17 10:35:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:35:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-17 10:35:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:38,359 INFO L225 Difference]: With dead ends: 35 [2022-10-17 10:35:38,359 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 10:35:38,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:35:38,362 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:38,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 10:35:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 10:35:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-10-17 10:35:38,365 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2022-10-17 10:35:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:38,366 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-10-17 10:35:38,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-10-17 10:35:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:35:38,368 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:38,368 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:38,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:38,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:38,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2022-10-17 10:35:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624870834] [2022-10-17 10:35:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:38,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624870834] [2022-10-17 10:35:38,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624870834] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:38,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083302743] [2022-10-17 10:35:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:38,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:38,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:38,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:35:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:35:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:38,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083302743] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:39,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:39,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-10-17 10:35:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747355058] [2022-10-17 10:35:39,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:39,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:35:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:39,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:35:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:35:39,062 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:39,392 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-10-17 10:35:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:35:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-10-17 10:35:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:39,393 INFO L225 Difference]: With dead ends: 121 [2022-10-17 10:35:39,393 INFO L226 Difference]: Without dead ends: 121 [2022-10-17 10:35:39,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:35:39,395 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 237 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:39,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 36 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:35:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-17 10:35:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 74. [2022-10-17 10:35:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-10-17 10:35:39,398 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 29 [2022-10-17 10:35:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:39,398 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-10-17 10:35:39,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-10-17 10:35:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 10:35:39,400 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:39,400 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:39,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:39,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:39,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2022-10-17 10:35:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:39,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625653095] [2022-10-17 10:35:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625653095] [2022-10-17 10:35:40,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625653095] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233405680] [2022-10-17 10:35:40,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:35:40,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:40,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:35:40,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:35:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:35:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:35:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:40,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233405680] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:40,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:40,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-10-17 10:35:40,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181316767] [2022-10-17 10:35:40,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-17 10:35:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-17 10:35:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-10-17 10:35:40,875 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:41,719 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2022-10-17 10:35:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-17 10:35:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 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 53 [2022-10-17 10:35:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:41,722 INFO L225 Difference]: With dead ends: 257 [2022-10-17 10:35:41,722 INFO L226 Difference]: Without dead ends: 257 [2022-10-17 10:35:41,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-10-17 10:35:41,725 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 702 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:41,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 56 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:35:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-10-17 10:35:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 146. [2022-10-17 10:35:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2022-10-17 10:35:41,731 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 53 [2022-10-17 10:35:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:41,731 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2022-10-17 10:35:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2022-10-17 10:35:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 10:35:41,733 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:41,733 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:41,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:35:41,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2022-10-17 10:35:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250569748] [2022-10-17 10:35:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:35:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250569748] [2022-10-17 10:35:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250569748] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444889281] [2022-10-17 10:35:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:35:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:43,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:43,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:35:43,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:35:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:35:43,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:35:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:43,333 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:35:43,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:35:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-17 10:35:43,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:35:43,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444889281] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:35:43,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:35:43,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [34] total 38 [2022-10-17 10:35:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800156275] [2022-10-17 10:35:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:35:43,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:35:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:35:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:35:43,733 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-10-17 10:35:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:43,769 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2022-10-17 10:35:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:35:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 101 [2022-10-17 10:35:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:43,772 INFO L225 Difference]: With dead ends: 145 [2022-10-17 10:35:43,772 INFO L226 Difference]: Without dead ends: 145 [2022-10-17 10:35:43,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:35:43,774 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:43,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:35:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-17 10:35:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-10-17 10:35:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-10-17 10:35:43,779 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 101 [2022-10-17 10:35:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:43,780 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-10-17 10:35:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-10-17 10:35:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-10-17 10:35:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-10-17 10:35:43,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:43,791 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:43,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:35:44,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1597271634, now seen corresponding path program 1 times [2022-10-17 10:35:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:44,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703035105] [2022-10-17 10:35:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:44,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-17 10:35:44,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703035105] [2022-10-17 10:35:44,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703035105] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:44,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942750807] [2022-10-17 10:35:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:44,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:44,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:44,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:35:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-17 10:35:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-10-17 10:35:45,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-10-17 10:35:47,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942750807] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:47,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:47,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 34, 34] total 82 [2022-10-17 10:35:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304364356] [2022-10-17 10:35:47,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:47,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-10-17 10:35:47,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-10-17 10:35:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2370, Invalid=4272, Unknown=0, NotChecked=0, Total=6642 [2022-10-17 10:35:47,248 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:35:49,626 INFO L93 Difference]: Finished difference Result 469 states and 470 transitions. [2022-10-17 10:35:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-10-17 10:35:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-10-17 10:35:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:35:49,629 INFO L225 Difference]: With dead ends: 469 [2022-10-17 10:35:49,629 INFO L226 Difference]: Without dead ends: 469 [2022-10-17 10:35:49,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4529, Invalid=8353, Unknown=0, NotChecked=0, Total=12882 [2022-10-17 10:35:49,636 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1372 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:35:49,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 93 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:35:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-10-17 10:35:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2022-10-17 10:35:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-10-17 10:35:49,643 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 144 [2022-10-17 10:35:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:35:49,644 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-10-17 10:35:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:35:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-10-17 10:35:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-10-17 10:35:49,649 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:35:49,649 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:35:49,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:35:49,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:35:49,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:35:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:35:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2434898, now seen corresponding path program 2 times [2022-10-17 10:35:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:35:49,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360884825] [2022-10-17 10:35:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:35:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:35:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:35:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-17 10:35:51,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:35:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360884825] [2022-10-17 10:35:51,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360884825] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:35:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033251182] [2022-10-17 10:35:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:35:51,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:35:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:35:51,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:35:51,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f388526-5d31-408b-ae1e-f406c27d4701/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:35:52,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:35:52,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:35:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-17 10:35:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:35:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2022-10-17 10:35:54,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:35:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2022-10-17 10:35:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033251182] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:35:58,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:35:58,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 66, 66] total 162 [2022-10-17 10:35:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621550334] [2022-10-17 10:35:58,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:35:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-10-17 10:35:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:35:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-10-17 10:35:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9346, Invalid=16736, Unknown=0, NotChecked=0, Total=26082 [2022-10-17 10:35:58,874 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 162 states, 162 states have (on average 3.0246913580246915) internal successors, (490), 162 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)