./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc --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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- 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-5e519f3 [2022-11-02 20:13:22,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:13:22,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:13:22,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:13:22,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:13:22,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:13:22,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:13:22,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:13:22,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:13:22,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:13:22,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:13:22,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:13:22,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:13:22,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:13:22,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:13:22,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:13:22,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:13:22,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:13:22,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:13:22,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:13:22,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:13:22,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:13:22,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:13:22,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:13:22,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:13:22,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:13:22,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:13:22,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:13:22,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:13:22,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:13:22,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:13:22,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:13:22,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:13:22,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:13:22,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:13:22,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:13:22,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:13:22,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:13:22,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:13:22,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:13:22,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:13:22,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:13:22,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:13:22,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:13:22,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:13:22,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:13:22,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:13:22,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:13:22,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:13:22,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:13:22,300 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:13:22,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:13:22,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:13:22,302 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:13:22,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:13:22,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:13:22,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:13:22,303 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:13:22,304 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:13:22,304 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:13:22,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:13:22,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:13:22,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:13:22,305 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:13:22,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:13:22,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:13:22,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:13:22,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:22,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:13:22,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:13:22,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:13:22,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:13:22,308 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_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2022-11-02 20:13:22,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:13:22,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:13:22,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:13:22,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:13:22,629 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:13:22,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety/test-0235-3.i [2022-11-02 20:13:22,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/data/2dfc82722/da1d91b4c7404b62b9058f699723bcdc/FLAG4e7d8341e [2022-11-02 20:13:23,231 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:13:23,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/sv-benchmarks/c/memsafety/test-0235-3.i [2022-11-02 20:13:23,257 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/data/2dfc82722/da1d91b4c7404b62b9058f699723bcdc/FLAG4e7d8341e [2022-11-02 20:13:23,551 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/data/2dfc82722/da1d91b4c7404b62b9058f699723bcdc [2022-11-02 20:13:23,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:13:23,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:13:23,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:23,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:13:23,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:13:23,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cba733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23, skipping insertion in model container [2022-11-02 20:13:23,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:13:23,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:13:24,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:24,150 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:13:24,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:24,227 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:13:24,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24 WrapperNode [2022-11-02 20:13:24,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:24,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:24,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:13:24,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:13:24,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,294 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2022-11-02 20:13:24,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:24,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:13:24,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:13:24,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:13:24,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,344 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:13:24,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:13:24,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:13:24,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:13:24,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (1/1) ... [2022-11-02 20:13:24,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:24,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:13:24,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:13:24,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:13:24,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:13:24,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:13:24,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:13:24,435 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-02 20:13:24,435 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-02 20:13:24,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:13:24,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:13:24,435 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-11-02 20:13:24,435 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-11-02 20:13:24,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:13:24,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:13:24,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:13:24,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:13:24,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:13:25,290 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:13:25,298 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:13:25,299 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-02 20:13:25,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:25 BoogieIcfgContainer [2022-11-02 20:13:25,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:13:25,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:13:25,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:13:25,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:13:25,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:13:23" (1/3) ... [2022-11-02 20:13:25,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef67d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:25, skipping insertion in model container [2022-11-02 20:13:25,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:24" (2/3) ... [2022-11-02 20:13:25,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef67d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:25, skipping insertion in model container [2022-11-02 20:13:25,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:25" (3/3) ... [2022-11-02 20:13:25,309 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2022-11-02 20:13:25,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:13:25,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2022-11-02 20:13:25,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:13:25,416 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;@3a3d38ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:13:25,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2022-11-02 20:13:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:13:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-02 20:13:25,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:25,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-02 20:13:25,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-11-02 20:13:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:25,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160548576] [2022-11-02 20:13:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:25,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:25,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160548576] [2022-11-02 20:13:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160548576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:25,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:25,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:13:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814104999] [2022-11-02 20:13:25,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:13:25,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:25,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:13:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:13:25,630 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:25,691 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2022-11-02 20:13:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:13:25,693 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-02 20:13:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:25,711 INFO L225 Difference]: With dead ends: 243 [2022-11-02 20:13:25,711 INFO L226 Difference]: Without dead ends: 241 [2022-11-02 20:13:25,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:13:25,718 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:25,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-02 20:13:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-02 20:13:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:13:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2022-11-02 20:13:25,798 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2022-11-02 20:13:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:25,798 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2022-11-02 20:13:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2022-11-02 20:13:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:13:25,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:25,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:13:25,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:13:25,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2022-11-02 20:13:25,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:25,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786722854] [2022-11-02 20:13:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:25,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:25,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259778832] [2022-11-02 20:13:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:25,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:13:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:13:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:26,021 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:26,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786722854] [2022-11-02 20:13:26,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259778832] [2022-11-02 20:13:26,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259778832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:26,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:26,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:13:26,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744903051] [2022-11-02 20:13:26,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:26,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:13:26,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:26,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:13:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:26,042 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:26,201 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2022-11-02 20:13:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:13:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:13:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:26,203 INFO L225 Difference]: With dead ends: 240 [2022-11-02 20:13:26,204 INFO L226 Difference]: Without dead ends: 240 [2022-11-02 20:13:26,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:26,205 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:26,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:13:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-02 20:13:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-02 20:13:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:13:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2022-11-02 20:13:26,224 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2022-11-02 20:13:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:26,224 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2022-11-02 20:13:26,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2022-11-02 20:13:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:13:26,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:26,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:26,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:26,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2022-11-02 20:13:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:26,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465256320] [2022-11-02 20:13:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:26,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890364328] [2022-11-02 20:13:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:26,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:26,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:26,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:13:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:13:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:26,611 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:13:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:26,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465256320] [2022-11-02 20:13:26,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890364328] [2022-11-02 20:13:26,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890364328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:26,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:26,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:13:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641936532] [2022-11-02 20:13:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:13:26,645 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:26,842 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2022-11-02 20:13:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:13:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:13:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:26,844 INFO L225 Difference]: With dead ends: 249 [2022-11-02 20:13:26,844 INFO L226 Difference]: Without dead ends: 249 [2022-11-02 20:13:26,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:26,848 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 16 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:26,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 709 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:13:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-02 20:13:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-02 20:13:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 145 states have (on average 1.7517241379310344) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:13:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2022-11-02 20:13:26,881 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 7 [2022-11-02 20:13:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:26,881 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2022-11-02 20:13:26,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2022-11-02 20:13:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:13:26,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:26,886 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:26,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:27,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1283052409, now seen corresponding path program 1 times [2022-11-02 20:13:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:27,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405686780] [2022-11-02 20:13:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:27,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362280342] [2022-11-02 20:13:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:27,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:27,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:27,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:13:27,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:27,425 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:27,441 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:29,696 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 48 treesize of output 42 [2022-11-02 20:13:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:13:30,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405686780] [2022-11-02 20:13:30,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362280342] [2022-11-02 20:13:30,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362280342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:30,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:30,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:13:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608589200] [2022-11-02 20:13:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:13:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:13:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:30,195 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:13:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:30,231 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-11-02 20:13:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:13:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-11-02 20:13:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:30,233 INFO L225 Difference]: With dead ends: 261 [2022-11-02 20:13:30,233 INFO L226 Difference]: Without dead ends: 251 [2022-11-02 20:13:30,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:30,234 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 0 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:30,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 973 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 89 Unchecked, 0.0s Time] [2022-11-02 20:13:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-02 20:13:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-11-02 20:13:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 234 states have internal predecessors, (256), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:13:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2022-11-02 20:13:30,244 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 66 [2022-11-02 20:13:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:30,244 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2022-11-02 20:13:30,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:13:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2022-11-02 20:13:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:13:30,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:30,246 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:30,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:30,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:30,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash 370417648, now seen corresponding path program 1 times [2022-11-02 20:13:30,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:30,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553455195] [2022-11-02 20:13:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:30,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:30,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:30,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704330706] [2022-11-02 20:13:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:30,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:30,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:13:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:13:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:30,870 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:30,894 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:31,018 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 52 treesize of output 46 [2022-11-02 20:13:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 58 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-02 20:13:31,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-02 20:13:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553455195] [2022-11-02 20:13:31,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704330706] [2022-11-02 20:13:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704330706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:31,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:31,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-02 20:13:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276682539] [2022-11-02 20:13:31,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:13:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:13:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:13:31,981 INFO L87 Difference]: Start difference. First operand 251 states and 282 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:13:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:34,588 INFO L93 Difference]: Finished difference Result 277 states and 320 transitions. [2022-11-02 20:13:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:13:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-11-02 20:13:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:34,592 INFO L225 Difference]: With dead ends: 277 [2022-11-02 20:13:34,592 INFO L226 Difference]: Without dead ends: 277 [2022-11-02 20:13:34,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:13:34,594 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 46 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:34,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1644 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-11-02 20:13:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-02 20:13:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 259. [2022-11-02 20:13:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 242 states have internal predecessors, (266), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-02 20:13:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 296 transitions. [2022-11-02 20:13:34,603 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 296 transitions. Word has length 71 [2022-11-02 20:13:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:34,604 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 296 transitions. [2022-11-02 20:13:34,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:13:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 296 transitions. [2022-11-02 20:13:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 20:13:34,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:34,606 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:34,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:34,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 221322147, now seen corresponding path program 2 times [2022-11-02 20:13:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:34,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376599632] [2022-11-02 20:13:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:34,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:34,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880202357] [2022-11-02 20:13:34,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:34,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:34,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:34,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:13:35,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:35,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:13:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:35,280 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 20:13:35,293 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:13:35,445 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 52 treesize of output 46 [2022-11-02 20:13:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-02 20:13:36,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 20:13:40,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:40,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376599632] [2022-11-02 20:13:40,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:40,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880202357] [2022-11-02 20:13:40,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880202357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:40,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:40,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-02 20:13:40,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294065875] [2022-11-02 20:13:40,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:13:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:13:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:13:40,722 INFO L87 Difference]: Start difference. First operand 259 states and 296 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:13:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:43,200 INFO L93 Difference]: Finished difference Result 281 states and 324 transitions. [2022-11-02 20:13:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:13:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2022-11-02 20:13:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:43,202 INFO L225 Difference]: With dead ends: 281 [2022-11-02 20:13:43,203 INFO L226 Difference]: Without dead ends: 281 [2022-11-02 20:13:43,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:13:43,204 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 17 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:43,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1656 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-11-02 20:13:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-02 20:13:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 264. [2022-11-02 20:13:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 158 states have (on average 1.7088607594936709) internal successors, (270), 247 states have internal predecessors, (270), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-02 20:13:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 303 transitions. [2022-11-02 20:13:43,214 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 303 transitions. Word has length 74 [2022-11-02 20:13:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:43,214 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 303 transitions. [2022-11-02 20:13:43,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:13:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 303 transitions. [2022-11-02 20:13:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:13:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:43,216 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:43,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:43,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:13:43,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1865839293, now seen corresponding path program 3 times [2022-11-02 20:13:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:43,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664262552] [2022-11-02 20:13:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:43,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:43,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703515255] [2022-11-02 20:13:43,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:13:43,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:43,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:43,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:43,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:13:43,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:13:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:13:43,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:43,662 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:13:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-02 20:13:43,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664262552] [2022-11-02 20:13:43,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:43,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703515255] [2022-11-02 20:13:43,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703515255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:43,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:13:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662608163] [2022-11-02 20:13:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:13:43,698 INFO L87 Difference]: Start difference. First operand 264 states and 303 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:13:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:43,901 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2022-11-02 20:13:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:13:43,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 76 [2022-11-02 20:13:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:43,903 INFO L225 Difference]: With dead ends: 263 [2022-11-02 20:13:43,903 INFO L226 Difference]: Without dead ends: 263 [2022-11-02 20:13:43,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:13:43,904 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 16 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:43,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 693 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:13:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-02 20:13:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-02 20:13:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 158 states have (on average 1.7025316455696202) internal successors, (269), 246 states have internal predecessors, (269), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-02 20:13:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 302 transitions. [2022-11-02 20:13:43,912 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 302 transitions. Word has length 76 [2022-11-02 20:13:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:43,916 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 302 transitions. [2022-11-02 20:13:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:13:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 302 transitions. [2022-11-02 20:13:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:13:43,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:43,922 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:43,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:44,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash 229542849, now seen corresponding path program 1 times [2022-11-02 20:13:44,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:44,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310435772] [2022-11-02 20:13:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:44,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:44,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:44,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279291578] [2022-11-02 20:13:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:44,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:44,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:44,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:13:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:13:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:44,703 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:13:44,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:13:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 131 proven. 17 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:13:44,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:45,039 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:13:45,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:13:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 131 proven. 17 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:13:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310435772] [2022-11-02 20:13:45,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279291578] [2022-11-02 20:13:45,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279291578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:45,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:45,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-11-02 20:13:45,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161800188] [2022-11-02 20:13:45,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:13:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:13:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:13:45,068 INFO L87 Difference]: Start difference. First operand 263 states and 302 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:13:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:53,972 INFO L93 Difference]: Finished difference Result 270 states and 320 transitions. [2022-11-02 20:13:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:13:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-11-02 20:13:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:53,975 INFO L225 Difference]: With dead ends: 270 [2022-11-02 20:13:53,975 INFO L226 Difference]: Without dead ends: 270 [2022-11-02 20:13:53,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:13:53,976 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 98 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:53,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1801 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 674 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-11-02 20:13:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-02 20:13:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 261. [2022-11-02 20:13:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 158 states have (on average 1.6898734177215189) internal successors, (267), 244 states have internal predecessors, (267), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-02 20:13:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 300 transitions. [2022-11-02 20:13:53,986 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 300 transitions. Word has length 84 [2022-11-02 20:13:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:53,986 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 300 transitions. [2022-11-02 20:13:53,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:13:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 300 transitions. [2022-11-02 20:13:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:13:53,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:53,988 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:54,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:54,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:54,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:13:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 229542850, now seen corresponding path program 1 times [2022-11-02 20:13:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:54,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249918516] [2022-11-02 20:13:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:54,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478731945] [2022-11-02 20:13:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:54,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:54,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:54,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:54,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:13:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:13:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:54,833 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:13:54,859 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 20:14:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:08,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-02 20:14:08,543 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:08,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 131 proven. 17 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:14:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249918516] [2022-11-02 20:14:09,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:14:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478731945] [2022-11-02 20:14:09,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478731945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:09,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:09,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-02 20:14:09,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301689507] [2022-11-02 20:14:09,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:09,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:14:09,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:14:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:14:09,192 INFO L87 Difference]: Start difference. First operand 261 states and 300 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:21,599 INFO L93 Difference]: Finished difference Result 361 states and 421 transitions. [2022-11-02 20:14:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:14:21,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2022-11-02 20:14:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:21,603 INFO L225 Difference]: With dead ends: 361 [2022-11-02 20:14:21,603 INFO L226 Difference]: Without dead ends: 361 [2022-11-02 20:14:21,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:14:21,604 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 110 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1751 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:21,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 797 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 237 Invalid, 0 Unknown, 1751 Unchecked, 0.8s Time] [2022-11-02 20:14:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-02 20:14:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 260. [2022-11-02 20:14:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 158 states have (on average 1.6835443037974684) internal successors, (266), 243 states have internal predecessors, (266), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-02 20:14:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 299 transitions. [2022-11-02 20:14:21,626 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 299 transitions. Word has length 84 [2022-11-02 20:14:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:21,628 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 299 transitions. [2022-11-02 20:14:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 299 transitions. [2022-11-02 20:14:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:14:21,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:21,633 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:21,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:21,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:14:21,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:14:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1547346018, now seen corresponding path program 1 times [2022-11-02 20:14:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:21,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67300108] [2022-11-02 20:14:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:21,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:14:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582832052] [2022-11-02 20:14:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:21,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:21,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:21,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:14:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:14:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:22,737 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:14:22,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:14:23,130 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:14:23,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:14:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 143 proven. 45 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-02 20:14:23,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67300108] [2022-11-02 20:14:24,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:14:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582832052] [2022-11-02 20:14:24,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582832052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:24,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:24,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-02 20:14:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018475858] [2022-11-02 20:14:24,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:24,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:14:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:14:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:14:24,019 INFO L87 Difference]: Start difference. First operand 260 states and 299 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:30,447 INFO L93 Difference]: Finished difference Result 308 states and 361 transitions. [2022-11-02 20:14:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:14:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2022-11-02 20:14:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:30,449 INFO L225 Difference]: With dead ends: 308 [2022-11-02 20:14:30,449 INFO L226 Difference]: Without dead ends: 298 [2022-11-02 20:14:30,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:14:30,450 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 148 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2080 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:30,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 2080 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 775 Invalid, 0 Unknown, 383 Unchecked, 1.8s Time] [2022-11-02 20:14:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-02 20:14:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 289. [2022-11-02 20:14:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 184 states have (on average 1.5978260869565217) internal successors, (294), 268 states have internal predecessors, (294), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 20:14:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 331 transitions. [2022-11-02 20:14:30,467 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 331 transitions. Word has length 86 [2022-11-02 20:14:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:30,468 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 331 transitions. [2022-11-02 20:14:30,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 331 transitions. [2022-11-02 20:14:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:14:30,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:30,470 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:30,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:14:30,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:14:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1547346019, now seen corresponding path program 1 times [2022-11-02 20:14:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602347649] [2022-11-02 20:14:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:30,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:14:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625218853] [2022-11-02 20:14:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:30,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:30,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:30,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:14:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:14:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:31,050 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:14:31,086 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:14:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:35,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:14:36,023 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:36,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 131 proven. 27 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-02 20:14:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:37,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602347649] [2022-11-02 20:14:37,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:14:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625218853] [2022-11-02 20:14:37,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625218853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:37,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:37,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-02 20:14:37,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63240284] [2022-11-02 20:14:37,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:37,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:14:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:14:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:14:37,005 INFO L87 Difference]: Start difference. First operand 289 states and 331 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:45,217 INFO L93 Difference]: Finished difference Result 426 states and 505 transitions. [2022-11-02 20:14:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:14:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2022-11-02 20:14:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:45,221 INFO L225 Difference]: With dead ends: 426 [2022-11-02 20:14:45,221 INFO L226 Difference]: Without dead ends: 415 [2022-11-02 20:14:45,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:14:45,222 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 110 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2467 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:45,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1692 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 2467 Unchecked, 0.7s Time] [2022-11-02 20:14:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-02 20:14:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 291. [2022-11-02 20:14:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.596774193548387) internal successors, (297), 270 states have internal predecessors, (297), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 20:14:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 334 transitions. [2022-11-02 20:14:45,237 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 334 transitions. Word has length 86 [2022-11-02 20:14:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:45,237 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 334 transitions. [2022-11-02 20:14:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 334 transitions. [2022-11-02 20:14:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:14:45,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:45,239 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:45,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:45,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:14:45,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:14:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1456883184, now seen corresponding path program 2 times [2022-11-02 20:14:45,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:45,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959418583] [2022-11-02 20:14:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:45,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:14:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951895399] [2022-11-02 20:14:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:14:45,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:45,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:45,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:14:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:14:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:14:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:46,030 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:14:46,065 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:14:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:50,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:14:50,638 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:14:50,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:14:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-02 20:14:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:51,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959418583] [2022-11-02 20:14:51,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:14:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951895399] [2022-11-02 20:14:51,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951895399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:51,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-02 20:14:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167332803] [2022-11-02 20:14:51,555 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:14:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:14:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:14:51,557 INFO L87 Difference]: Start difference. First operand 291 states and 334 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:57,185 INFO L93 Difference]: Finished difference Result 430 states and 512 transitions. [2022-11-02 20:14:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:14:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 87 [2022-11-02 20:14:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:57,188 INFO L225 Difference]: With dead ends: 430 [2022-11-02 20:14:57,188 INFO L226 Difference]: Without dead ends: 419 [2022-11-02 20:14:57,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:14:57,189 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 110 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2750 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:57,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1822 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 2750 Unchecked, 0.7s Time] [2022-11-02 20:14:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-02 20:14:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 293. [2022-11-02 20:14:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 188 states have (on average 1.5957446808510638) internal successors, (300), 272 states have internal predecessors, (300), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 20:14:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 337 transitions. [2022-11-02 20:14:57,202 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 337 transitions. Word has length 87 [2022-11-02 20:14:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:57,203 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 337 transitions. [2022-11-02 20:14:57,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:14:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 337 transitions. [2022-11-02 20:14:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:14:57,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:57,204 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:57,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:57,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:14:57,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:14:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1347464701, now seen corresponding path program 3 times [2022-11-02 20:14:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:57,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156211176] [2022-11-02 20:14:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:57,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:14:57,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806680116] [2022-11-02 20:14:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:14:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:57,468 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:57,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:14:57,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:14:57,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:14:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:57,793 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-02 20:14:57,858 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 13 treesize of output 9 [2022-11-02 20:14:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-11-02 20:14:58,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-11-02 20:14:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156211176] [2022-11-02 20:14:58,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:14:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806680116] [2022-11-02 20:14:58,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806680116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:58,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:14:58,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-02 20:14:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005667851] [2022-11-02 20:14:58,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:58,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:14:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:14:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:14:58,602 INFO L87 Difference]: Start difference. First operand 293 states and 337 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-02 20:14:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:59,860 INFO L93 Difference]: Finished difference Result 324 states and 369 transitions. [2022-11-02 20:14:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:14:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 88 [2022-11-02 20:14:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:59,862 INFO L225 Difference]: With dead ends: 324 [2022-11-02 20:14:59,862 INFO L226 Difference]: Without dead ends: 299 [2022-11-02 20:14:59,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:14:59,863 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 60 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:59,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1358 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:14:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-02 20:14:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-02 20:14:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 194 states have (on average 1.5721649484536082) internal successors, (305), 278 states have internal predecessors, (305), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 20:14:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 342 transitions. [2022-11-02 20:14:59,873 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 342 transitions. Word has length 88 [2022-11-02 20:14:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:59,873 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 342 transitions. [2022-11-02 20:14:59,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-02 20:14:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 342 transitions. [2022-11-02 20:14:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 20:14:59,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:59,875 INFO L195 NwaCegarLoop]: trace histogram [19, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:59,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:00,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:15:00,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:15:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:00,089 INFO L85 PathProgramCache]: Analyzing trace with hash -415935041, now seen corresponding path program 4 times [2022-11-02 20:15:00,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:00,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410330268] [2022-11-02 20:15:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:00,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:00,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:15:00,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553027872] [2022-11-02 20:15:00,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:15:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:00,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:00,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:15:01,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:15:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:15:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:01,075 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:15:01,103 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:15:01,174 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:15:06,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:06,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:15:06,596 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:15:06,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:15:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 217 proven. 63 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-02 20:15:06,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:07,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:07,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410330268] [2022-11-02 20:15:07,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:15:07,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553027872] [2022-11-02 20:15:07,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553027872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:07,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:07,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-02 20:15:07,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631287308] [2022-11-02 20:15:07,436 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:07,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:15:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:15:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:15:07,438 INFO L87 Difference]: Start difference. First operand 299 states and 342 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:15:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:14,301 INFO L93 Difference]: Finished difference Result 434 states and 512 transitions. [2022-11-02 20:15:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:15:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 94 [2022-11-02 20:15:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:14,304 INFO L225 Difference]: With dead ends: 434 [2022-11-02 20:15:14,305 INFO L226 Difference]: Without dead ends: 423 [2022-11-02 20:15:14,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:15:14,306 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 110 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1868 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:14,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 838 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 1868 Unchecked, 0.7s Time] [2022-11-02 20:15:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-02 20:15:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 301. [2022-11-02 20:15:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 196 states have (on average 1.5714285714285714) internal successors, (308), 280 states have internal predecessors, (308), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 20:15:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2022-11-02 20:15:14,318 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 94 [2022-11-02 20:15:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:14,319 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2022-11-02 20:15:14,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:15:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2022-11-02 20:15:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 20:15:14,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:14,321 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:14,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:14,544 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:15:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash -547270764, now seen corresponding path program 5 times [2022-11-02 20:15:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907249537] [2022-11-02 20:15:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:14,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:15:14,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547417586] [2022-11-02 20:15:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:15:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:14,579 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:14,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:15:14,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:15:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:15:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:15,038 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:15:15,167 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 22 treesize of output 16 [2022-11-02 20:15:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 216 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-02 20:15:15,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-02 20:15:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907249537] [2022-11-02 20:15:16,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:15:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547417586] [2022-11-02 20:15:16,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547417586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:15:16,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:16,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 20:15:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612280460] [2022-11-02 20:15:16,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:16,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:15:16,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:15:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:15:16,108 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:15:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:17,377 INFO L93 Difference]: Finished difference Result 320 states and 362 transitions. [2022-11-02 20:15:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:15:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 95 [2022-11-02 20:15:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:17,380 INFO L225 Difference]: With dead ends: 320 [2022-11-02 20:15:17,380 INFO L226 Difference]: Without dead ends: 300 [2022-11-02 20:15:17,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:15:17,381 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 66 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:17,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1188 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:15:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-02 20:15:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-11-02 20:15:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 196 states have (on average 1.5510204081632653) internal successors, (304), 279 states have internal predecessors, (304), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 20:15:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 338 transitions. [2022-11-02 20:15:17,392 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 338 transitions. Word has length 95 [2022-11-02 20:15:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:17,392 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 338 transitions. [2022-11-02 20:15:17,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:15:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 338 transitions. [2022-11-02 20:15:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-02 20:15:17,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:17,394 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:17,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:15:17,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:15:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1178892505, now seen corresponding path program 6 times [2022-11-02 20:15:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731114008] [2022-11-02 20:15:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:17,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:17,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:15:17,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450208815] [2022-11-02 20:15:17,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:15:17,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:17,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:17,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:15:53,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 20:15:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:15:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:54,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:15:54,538 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:15:54,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:15:54,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:54,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:15:54,848 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:15:54,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:15:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 533 proven. 182 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-02 20:15:54,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:55,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:55,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731114008] [2022-11-02 20:15:55,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:15:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450208815] [2022-11-02 20:15:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450208815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:55,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:55,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-02 20:15:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882502390] [2022-11-02 20:15:55,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:15:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:15:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:15:55,409 INFO L87 Difference]: Start difference. First operand 300 states and 338 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:01,912 INFO L93 Difference]: Finished difference Result 547 states and 642 transitions. [2022-11-02 20:16:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:16:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2022-11-02 20:16:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:01,917 INFO L225 Difference]: With dead ends: 547 [2022-11-02 20:16:01,917 INFO L226 Difference]: Without dead ends: 547 [2022-11-02 20:16:01,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:16:01,918 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 243 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 511 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:01,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 817 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2381 Invalid, 0 Unknown, 511 Unchecked, 6.0s Time] [2022-11-02 20:16:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-02 20:16:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 303. [2022-11-02 20:16:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 199 states have (on average 1.5427135678391959) internal successors, (307), 282 states have internal predecessors, (307), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 20:16:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 341 transitions. [2022-11-02 20:16:01,932 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 341 transitions. Word has length 112 [2022-11-02 20:16:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:01,932 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 341 transitions. [2022-11-02 20:16:01,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 341 transitions. [2022-11-02 20:16:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-02 20:16:01,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:01,934 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:01,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:02,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:02,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:16:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2109037990, now seen corresponding path program 1 times [2022-11-02 20:16:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:02,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164766157] [2022-11-02 20:16:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:02,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:02,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:16:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790632652] [2022-11-02 20:16:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:02,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:02,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:02,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:16:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:16:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 252 proven. 63 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-11-02 20:16:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:02,972 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 8 treesize of output 6 [2022-11-02 20:16:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 252 proven. 63 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-11-02 20:16:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164766157] [2022-11-02 20:16:03,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:16:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790632652] [2022-11-02 20:16:03,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790632652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:03,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:16:03,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:16:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816058548] [2022-11-02 20:16:03,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:16:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:16:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:16:03,311 INFO L87 Difference]: Start difference. First operand 303 states and 341 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:04,204 INFO L93 Difference]: Finished difference Result 321 states and 372 transitions. [2022-11-02 20:16:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:16:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 113 [2022-11-02 20:16:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:04,207 INFO L225 Difference]: With dead ends: 321 [2022-11-02 20:16:04,208 INFO L226 Difference]: Without dead ends: 321 [2022-11-02 20:16:04,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 211 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:16:04,209 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 225 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:04,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1552 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:16:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-02 20:16:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 302. [2022-11-02 20:16:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 199 states have (on average 1.5326633165829147) internal successors, (305), 281 states have internal predecessors, (305), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 20:16:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 339 transitions. [2022-11-02 20:16:04,220 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 339 transitions. Word has length 113 [2022-11-02 20:16:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:04,221 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 339 transitions. [2022-11-02 20:16:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 339 transitions. [2022-11-02 20:16:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-02 20:16:04,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:04,223 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:04,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:04,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:16:04,429 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:16:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1990196238, now seen corresponding path program 1 times [2022-11-02 20:16:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461548234] [2022-11-02 20:16:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:04,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:16:04,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254145876] [2022-11-02 20:16:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:04,478 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:04,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:16:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:16:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:05,534 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:16:05,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:16:05,837 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:16:05,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:16:06,237 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:16:06,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:16:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 471 proven. 294 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-02 20:16:06,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:07,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461548234] [2022-11-02 20:16:07,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:16:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254145876] [2022-11-02 20:16:07,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254145876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:07,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:16:07,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-02 20:16:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811546892] [2022-11-02 20:16:07,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:07,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:16:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:16:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:16:07,151 INFO L87 Difference]: Start difference. First operand 302 states and 339 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:09,909 INFO L93 Difference]: Finished difference Result 543 states and 625 transitions. [2022-11-02 20:16:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:16:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 119 [2022-11-02 20:16:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:09,912 INFO L225 Difference]: With dead ends: 543 [2022-11-02 20:16:09,912 INFO L226 Difference]: Without dead ends: 543 [2022-11-02 20:16:09,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:16:09,913 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 276 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:09,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1999 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1027 Invalid, 0 Unknown, 380 Unchecked, 2.3s Time] [2022-11-02 20:16:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-02 20:16:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 395. [2022-11-02 20:16:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 283 states have (on average 1.4063604240282686) internal successors, (398), 365 states have internal predecessors, (398), 20 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2022-11-02 20:16:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 443 transitions. [2022-11-02 20:16:09,928 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 443 transitions. Word has length 119 [2022-11-02 20:16:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:09,929 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 443 transitions. [2022-11-02 20:16:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 443 transitions. [2022-11-02 20:16:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-02 20:16:09,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:09,930 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:09,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:16:10,145 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:16:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1990196239, now seen corresponding path program 1 times [2022-11-02 20:16:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:10,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848826409] [2022-11-02 20:16:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:10,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:10,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:16:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733027153] [2022-11-02 20:16:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:10,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:10,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:10,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:16:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:16:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:12,699 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:16:12,732 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:16:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:16:22,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:16:23,005 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:16:23,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:16:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 481 proven. 91 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2022-11-02 20:16:23,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:23,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848826409] [2022-11-02 20:16:23,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:16:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733027153] [2022-11-02 20:16:23,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733027153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:23,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:16:23,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-02 20:16:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021725037] [2022-11-02 20:16:23,814 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:23,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:16:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:16:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:16:23,816 INFO L87 Difference]: Start difference. First operand 395 states and 443 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:33,472 INFO L93 Difference]: Finished difference Result 560 states and 650 transitions. [2022-11-02 20:16:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:16:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 119 [2022-11-02 20:16:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:33,475 INFO L225 Difference]: With dead ends: 560 [2022-11-02 20:16:33,476 INFO L226 Difference]: Without dead ends: 538 [2022-11-02 20:16:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:16:33,478 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 110 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2873 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1180 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 235 Invalid, 0 Unknown, 2873 Unchecked, 0.9s Time] [2022-11-02 20:16:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-02 20:16:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2022-11-02 20:16:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 287 states have (on average 1.4076655052264808) internal successors, (404), 369 states have internal predecessors, (404), 20 states have call successors, (20), 9 states have call predecessors, (20), 11 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2022-11-02 20:16:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 449 transitions. [2022-11-02 20:16:33,510 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 449 transitions. Word has length 119 [2022-11-02 20:16:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:33,510 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 449 transitions. [2022-11-02 20:16:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:16:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 449 transitions. [2022-11-02 20:16:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-02 20:16:33,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:33,513 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:33,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:33,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:33,728 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:16:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 557844586, now seen corresponding path program 2 times [2022-11-02 20:16:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926481416] [2022-11-02 20:16:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:33,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:16:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735732471] [2022-11-02 20:16:33,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:16:33,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:33,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:16:37,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:16:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:16:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:37,577 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:16:37,667 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 13 treesize of output 9 [2022-11-02 20:16:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 667 proven. 21 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-02 20:16:38,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 112 proven. 203 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-11-02 20:16:39,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926481416] [2022-11-02 20:16:39,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:16:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735732471] [2022-11-02 20:16:39,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735732471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:39,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:16:39,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-02 20:16:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834451386] [2022-11-02 20:16:39,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:39,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:16:39,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:39,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:16:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:16:39,765 INFO L87 Difference]: Start difference. First operand 399 states and 449 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:16:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:41,961 INFO L93 Difference]: Finished difference Result 457 states and 500 transitions. [2022-11-02 20:16:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:16:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 120 [2022-11-02 20:16:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:41,965 INFO L225 Difference]: With dead ends: 457 [2022-11-02 20:16:41,965 INFO L226 Difference]: Without dead ends: 397 [2022-11-02 20:16:41,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:16:41,966 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 76 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:41,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2351 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:16:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-02 20:16:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2022-11-02 20:16:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 287 states have (on average 1.3937282229965158) internal successors, (400), 367 states have internal predecessors, (400), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-02 20:16:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 440 transitions. [2022-11-02 20:16:41,978 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 440 transitions. Word has length 120 [2022-11-02 20:16:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:41,978 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 440 transitions. [2022-11-02 20:16:41,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:16:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 440 transitions. [2022-11-02 20:16:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-02 20:16:41,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:41,980 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:42,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:42,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:42,196 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:16:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835146, now seen corresponding path program 3 times [2022-11-02 20:16:42,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612058249] [2022-11-02 20:16:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:42,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:42,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:16:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974215479] [2022-11-02 20:16:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:16:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:42,247 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:42,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:16:52,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 20:16:52,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:16:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:52,693 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:16:52,761 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 13 treesize of output 9 [2022-11-02 20:16:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 440 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-02 20:16:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 440 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-02 20:16:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612058249] [2022-11-02 20:16:55,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:16:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974215479] [2022-11-02 20:16:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974215479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:16:55,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:16:55,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-02 20:16:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389806024] [2022-11-02 20:16:55,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:55,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:16:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:16:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:16:55,726 INFO L87 Difference]: Start difference. First operand 397 states and 440 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-02 20:17:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:08,361 INFO L93 Difference]: Finished difference Result 477 states and 548 transitions. [2022-11-02 20:17:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:17:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 130 [2022-11-02 20:17:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:08,364 INFO L225 Difference]: With dead ends: 477 [2022-11-02 20:17:08,364 INFO L226 Difference]: Without dead ends: 437 [2022-11-02 20:17:08,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 20:17:08,367 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 198 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 2672 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:08,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 2672 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 20:17:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-02 20:17:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-02 20:17:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 327 states have (on average 1.3333333333333333) internal successors, (436), 407 states have internal predecessors, (436), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-02 20:17:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 476 transitions. [2022-11-02 20:17:08,381 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 476 transitions. Word has length 130 [2022-11-02 20:17:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:08,381 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 476 transitions. [2022-11-02 20:17:08,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-02 20:17:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 476 transitions. [2022-11-02 20:17:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-02 20:17:08,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:08,383 INFO L195 NwaCegarLoop]: trace histogram [58, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:08,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:08,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:17:08,605 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-11-02 20:17:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 868988202, now seen corresponding path program 4 times [2022-11-02 20:17:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561658277] [2022-11-02 20:17:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:08,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:17:08,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399389054] [2022-11-02 20:17:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:17:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:08,663 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:08,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942e6abb-cd27-4c59-85f3-72035ae7de90/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:17:11,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:17:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:17:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-02 20:17:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:11,628 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:17:11,710 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:17:11,750 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:17:24,120 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:17:24,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-11-02 20:17:24,838 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:17:24,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:17:31,261 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:17:31,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-02 20:17:31,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:17:36,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:17:36,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:17:36,877 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-02 20:17:36,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25