./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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-6b4ec56 [2022-11-20 11:38:52,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:38:52,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:38:52,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:38:52,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:38:52,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:38:52,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:38:52,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:38:52,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:38:52,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:38:52,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:38:52,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:38:52,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:38:52,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:38:52,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:38:52,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:38:52,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:38:52,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:38:52,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:38:52,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:38:52,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:38:52,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:38:52,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:38:52,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:38:52,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:38:52,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:38:52,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:38:52,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:38:52,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:38:52,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:38:52,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:38:52,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:38:52,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:38:52,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:38:52,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:38:52,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:38:52,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:38:52,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:38:52,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:38:52,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:38:52,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:38:52,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:38:52,526 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:38:52,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:38:52,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:38:52,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:38:52,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:38:52,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:38:52,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:38:52,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:38:52,530 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:38:52,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:38:52,531 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:38:52,532 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:38:52,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:38:52,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:38:52,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:38:52,533 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:38:52,533 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:38:52,533 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:38:52,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:38:52,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:38:52,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:38:52,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:38:52,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:38:52,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:38:52,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:38:52,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:38:52,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:38:52,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:38:52,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:38:52,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:38:52,536 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_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-20 11:38:52,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:38:52,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:38:52,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:38:52,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:38:52,927 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:38:52,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-20 11:38:55,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:38:56,327 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:38:56,328 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-20 11:38:56,342 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/data/87245fada/312cb36e3fae48468cb461793d673b73/FLAG6022943ca [2022-11-20 11:38:56,370 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/data/87245fada/312cb36e3fae48468cb461793d673b73 [2022-11-20 11:38:56,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:38:56,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:38:56,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:38:56,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:38:56,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:38:56,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:38:56" (1/1) ... [2022-11-20 11:38:56,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7228c94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:56, skipping insertion in model container [2022-11-20 11:38:56,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:38:56" (1/1) ... [2022-11-20 11:38:56,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:38:56,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:38:57,060 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-20 11:38:57,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:38:57,125 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:38:57,187 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-20 11:38:57,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:38:57,282 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:38:57,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57 WrapperNode [2022-11-20 11:38:57,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:38:57,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:38:57,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:38:57,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:38:57,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,375 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-20 11:38:57,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:38:57,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:38:57,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:38:57,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:38:57,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,437 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:38:57,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:38:57,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:38:57,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:38:57,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (1/1) ... [2022-11-20 11:38:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:38:57,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:57,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:38:57,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:38:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 11:38:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 11:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 11:38:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 11:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:38:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:38:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:38:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:38:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:38:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:38:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:38:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:38:57,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:38:57,565 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:38:57,772 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:38:57,781 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:38:58,173 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:38:58,183 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:38:58,184 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:38:58,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:38:58 BoogieIcfgContainer [2022-11-20 11:38:58,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:38:58,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:38:58,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:38:58,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:38:58,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:38:56" (1/3) ... [2022-11-20 11:38:58,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cef4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:38:58, skipping insertion in model container [2022-11-20 11:38:58,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:57" (2/3) ... [2022-11-20 11:38:58,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cef4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:38:58, skipping insertion in model container [2022-11-20 11:38:58,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:38:58" (3/3) ... [2022-11-20 11:38:58,204 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-20 11:38:58,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:38:58,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-20 11:38:58,227 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:38:58,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:38:58,444 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:38:58,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 186 transitions, 388 flow [2022-11-20 11:38:58,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 186 transitions, 388 flow [2022-11-20 11:38:58,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 186 transitions, 388 flow [2022-11-20 11:38:58,559 INFO L130 PetriNetUnfolder]: 10/184 cut-off events. [2022-11-20 11:38:58,559 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:38:58,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 10/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 488 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-11-20 11:38:58,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-11-20 11:39:05,080 INFO L134 LiptonReduction]: Checked pairs total: 15485 [2022-11-20 11:39:05,081 INFO L136 LiptonReduction]: Total number of compositions: 189 [2022-11-20 11:39:05,090 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 49 transitions, 114 flow [2022-11-20 11:39:05,165 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:05,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:05,197 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;@2c8ffa4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:05,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-20 11:39:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 11:39:05,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:05,208 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 11:39:05,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 763, now seen corresponding path program 1 times [2022-11-20 11:39:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:05,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557196083] [2022-11-20 11:39:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:05,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:05,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557196083] [2022-11-20 11:39:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557196083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:05,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:05,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 11:39:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630229527] [2022-11-20 11:39:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:05,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:05,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:05,418 INFO L87 Difference]: Start difference. First operand has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:05,579 INFO L93 Difference]: Finished difference Result 780 states and 2224 transitions. [2022-11-20 11:39:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-20 11:39:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:05,612 INFO L225 Difference]: With dead ends: 780 [2022-11-20 11:39:05,613 INFO L226 Difference]: Without dead ends: 780 [2022-11-20 11:39:05,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:05,619 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:05,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-11-20 11:39:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2022-11-20 11:39:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 716 states have (on average 3.106145251396648) internal successors, (2224), 779 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2224 transitions. [2022-11-20 11:39:05,752 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2224 transitions. Word has length 1 [2022-11-20 11:39:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:05,753 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 2224 transitions. [2022-11-20 11:39:05,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2224 transitions. [2022-11-20 11:39:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:39:05,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:05,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:39:05,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:39:05,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 749726, now seen corresponding path program 1 times [2022-11-20 11:39:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035196197] [2022-11-20 11:39:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:06,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035196197] [2022-11-20 11:39:06,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035196197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:06,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:06,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:39:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326840213] [2022-11-20 11:39:06,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:06,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,043 INFO L87 Difference]: Start difference. First operand 780 states and 2224 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:06,122 INFO L93 Difference]: Finished difference Result 754 states and 2169 transitions. [2022-11-20 11:39:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 11:39:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:06,131 INFO L225 Difference]: With dead ends: 754 [2022-11-20 11:39:06,131 INFO L226 Difference]: Without dead ends: 754 [2022-11-20 11:39:06,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,134 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:06,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-20 11:39:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-20 11:39:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 698 states have (on average 3.1074498567335245) internal successors, (2169), 753 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2169 transitions. [2022-11-20 11:39:06,208 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2169 transitions. Word has length 3 [2022-11-20 11:39:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:06,209 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2169 transitions. [2022-11-20 11:39:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2169 transitions. [2022-11-20 11:39:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:39:06,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:06,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:39:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:39:06,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash 749724, now seen corresponding path program 1 times [2022-11-20 11:39:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135877284] [2022-11-20 11:39:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:06,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:06,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135877284] [2022-11-20 11:39:06,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135877284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:06,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:39:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519775497] [2022-11-20 11:39:06,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,347 INFO L87 Difference]: Start difference. First operand 754 states and 2169 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:06,417 INFO L93 Difference]: Finished difference Result 728 states and 2114 transitions. [2022-11-20 11:39:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 11:39:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:06,425 INFO L225 Difference]: With dead ends: 728 [2022-11-20 11:39:06,426 INFO L226 Difference]: Without dead ends: 728 [2022-11-20 11:39:06,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,430 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:06,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-20 11:39:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-11-20 11:39:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 680 states have (on average 3.1088235294117648) internal successors, (2114), 727 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2114 transitions. [2022-11-20 11:39:06,458 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2114 transitions. Word has length 3 [2022-11-20 11:39:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:06,458 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 2114 transitions. [2022-11-20 11:39:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2114 transitions. [2022-11-20 11:39:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:39:06,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:06,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:39:06,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:39:06,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 720503190, now seen corresponding path program 1 times [2022-11-20 11:39:06,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:06,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627248467] [2022-11-20 11:39:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:06,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627248467] [2022-11-20 11:39:06,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627248467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:06,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:06,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759818497] [2022-11-20 11:39:06,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:06,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:06,584 INFO L87 Difference]: Start difference. First operand 728 states and 2114 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:06,662 INFO L93 Difference]: Finished difference Result 560 states and 1572 transitions. [2022-11-20 11:39:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:06,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:39:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:06,667 INFO L225 Difference]: With dead ends: 560 [2022-11-20 11:39:06,667 INFO L226 Difference]: Without dead ends: 560 [2022-11-20 11:39:06,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:06,669 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:06,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-20 11:39:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-11-20 11:39:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 528 states have (on average 2.977272727272727) internal successors, (1572), 559 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1572 transitions. [2022-11-20 11:39:06,689 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1572 transitions. Word has length 5 [2022-11-20 11:39:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:06,691 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 1572 transitions. [2022-11-20 11:39:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1572 transitions. [2022-11-20 11:39:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:39:06,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:06,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:39:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:39:06,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash 720503191, now seen corresponding path program 1 times [2022-11-20 11:39:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:06,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380572392] [2022-11-20 11:39:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:06,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380572392] [2022-11-20 11:39:06,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380572392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:06,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:06,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:39:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306497541] [2022-11-20 11:39:06,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:06,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,742 INFO L87 Difference]: Start difference. First operand 560 states and 1572 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:06,814 INFO L93 Difference]: Finished difference Result 392 states and 1030 transitions. [2022-11-20 11:39:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:39:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:06,818 INFO L225 Difference]: With dead ends: 392 [2022-11-20 11:39:06,818 INFO L226 Difference]: Without dead ends: 392 [2022-11-20 11:39:06,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:06,819 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:06,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-20 11:39:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-11-20 11:39:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 376 states have (on average 2.7393617021276597) internal successors, (1030), 391 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1030 transitions. [2022-11-20 11:39:06,841 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1030 transitions. Word has length 5 [2022-11-20 11:39:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:06,842 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 1030 transitions. [2022-11-20 11:39:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1030 transitions. [2022-11-20 11:39:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:39:06,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:06,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:39:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:39:06,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 859900896, now seen corresponding path program 1 times [2022-11-20 11:39:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240016029] [2022-11-20 11:39:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240016029] [2022-11-20 11:39:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240016029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:07,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:07,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333817779] [2022-11-20 11:39:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:07,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:07,092 INFO L87 Difference]: Start difference. First operand 392 states and 1030 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:07,220 INFO L93 Difference]: Finished difference Result 451 states and 1170 transitions. [2022-11-20 11:39:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:39:07,221 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:39:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:07,224 INFO L225 Difference]: With dead ends: 451 [2022-11-20 11:39:07,224 INFO L226 Difference]: Without dead ends: 451 [2022-11-20 11:39:07,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:07,225 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:07,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-20 11:39:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 362. [2022-11-20 11:39:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 350 states have (on average 2.72) internal successors, (952), 361 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 952 transitions. [2022-11-20 11:39:07,259 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 952 transitions. Word has length 6 [2022-11-20 11:39:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:07,260 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 952 transitions. [2022-11-20 11:39:07,260 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 952 transitions. [2022-11-20 11:39:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:39:07,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:07,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:39:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:39:07,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash 859900897, now seen corresponding path program 1 times [2022-11-20 11:39:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038834946] [2022-11-20 11:39:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038834946] [2022-11-20 11:39:07,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038834946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:07,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:07,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336667618] [2022-11-20 11:39:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:07,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:39:07,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:39:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:39:07,600 INFO L87 Difference]: Start difference. First operand 362 states and 952 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:07,773 INFO L93 Difference]: Finished difference Result 440 states and 1128 transitions. [2022-11-20 11:39:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:39:07,774 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:39:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:07,777 INFO L225 Difference]: With dead ends: 440 [2022-11-20 11:39:07,777 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 11:39:07,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:07,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:07,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 11:39:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 428. [2022-11-20 11:39:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 416 states have (on average 2.6778846153846154) internal successors, (1114), 427 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1114 transitions. [2022-11-20 11:39:07,794 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1114 transitions. Word has length 6 [2022-11-20 11:39:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:07,795 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 1114 transitions. [2022-11-20 11:39:07,795 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1114 transitions. [2022-11-20 11:39:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:39:07,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:07,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:07,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:39:07,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1366824338, now seen corresponding path program 1 times [2022-11-20 11:39:07,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:07,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245179974] [2022-11-20 11:39:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:07,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245179974] [2022-11-20 11:39:07,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245179974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:07,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:07,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871936444] [2022-11-20 11:39:07,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:07,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:07,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:07,852 INFO L87 Difference]: Start difference. First operand 428 states and 1114 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:07,950 INFO L93 Difference]: Finished difference Result 458 states and 1192 transitions. [2022-11-20 11:39:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:39:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:07,954 INFO L225 Difference]: With dead ends: 458 [2022-11-20 11:39:07,954 INFO L226 Difference]: Without dead ends: 458 [2022-11-20 11:39:07,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:07,955 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:07,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-20 11:39:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-11-20 11:39:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 446 states have (on average 2.672645739910314) internal successors, (1192), 457 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1192 transitions. [2022-11-20 11:39:07,971 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1192 transitions. Word has length 10 [2022-11-20 11:39:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:07,971 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 1192 transitions. [2022-11-20 11:39:07,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1192 transitions. [2022-11-20 11:39:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:39:07,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:07,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:07,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:39:07,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2006710853, now seen corresponding path program 1 times [2022-11-20 11:39:07,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:07,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513121486] [2022-11-20 11:39:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:07,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:08,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513121486] [2022-11-20 11:39:08,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513121486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:08,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:08,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329649356] [2022-11-20 11:39:08,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:08,015 INFO L87 Difference]: Start difference. First operand 458 states and 1192 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:08,120 INFO L93 Difference]: Finished difference Result 476 states and 1233 transitions. [2022-11-20 11:39:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-20 11:39:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:08,123 INFO L225 Difference]: With dead ends: 476 [2022-11-20 11:39:08,124 INFO L226 Difference]: Without dead ends: 476 [2022-11-20 11:39:08,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:08,125 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:08,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-20 11:39:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 440. [2022-11-20 11:39:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 428 states have (on average 2.677570093457944) internal successors, (1146), 439 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1146 transitions. [2022-11-20 11:39:08,142 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1146 transitions. Word has length 13 [2022-11-20 11:39:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:08,142 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1146 transitions. [2022-11-20 11:39:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1146 transitions. [2022-11-20 11:39:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:39:08,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:08,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:08,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:39:08,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1519702029, now seen corresponding path program 1 times [2022-11-20 11:39:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:08,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267249856] [2022-11-20 11:39:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:08,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267249856] [2022-11-20 11:39:08,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267249856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560141777] [2022-11-20 11:39:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:08,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:08,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:08,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:39:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 11:39:08,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 11:39:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:09,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:09,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560141777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:09,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:09,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-20 11:39:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352315116] [2022-11-20 11:39:09,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:39:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:39:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:39:09,429 INFO L87 Difference]: Start difference. First operand 440 states and 1146 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:10,538 INFO L93 Difference]: Finished difference Result 1062 states and 2727 transitions. [2022-11-20 11:39:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:39:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 13 [2022-11-20 11:39:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:10,545 INFO L225 Difference]: With dead ends: 1062 [2022-11-20 11:39:10,545 INFO L226 Difference]: Without dead ends: 1062 [2022-11-20 11:39:10,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:39:10,546 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 236 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:10,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 2 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:39:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-11-20 11:39:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 764. [2022-11-20 11:39:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 752 states have (on average 2.7367021276595747) internal successors, (2058), 763 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2058 transitions. [2022-11-20 11:39:10,586 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2058 transitions. Word has length 13 [2022-11-20 11:39:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:10,587 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 2058 transitions. [2022-11-20 11:39:10,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2058 transitions. [2022-11-20 11:39:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:39:10,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:10,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:10,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:10,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:10,805 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1444222860, now seen corresponding path program 1 times [2022-11-20 11:39:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984785992] [2022-11-20 11:39:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984785992] [2022-11-20 11:39:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984785992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163694122] [2022-11-20 11:39:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:10,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:10,959 INFO L87 Difference]: Start difference. First operand 764 states and 2058 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:11,030 INFO L93 Difference]: Finished difference Result 364 states and 831 transitions. [2022-11-20 11:39:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:39:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:11,033 INFO L225 Difference]: With dead ends: 364 [2022-11-20 11:39:11,033 INFO L226 Difference]: Without dead ends: 364 [2022-11-20 11:39:11,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:11,034 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-20 11:39:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 354. [2022-11-20 11:39:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 348 states have (on average 2.32183908045977) internal successors, (808), 353 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 808 transitions. [2022-11-20 11:39:11,044 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 808 transitions. Word has length 18 [2022-11-20 11:39:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:11,045 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 808 transitions. [2022-11-20 11:39:11,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 808 transitions. [2022-11-20 11:39:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:39:11,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:11,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:11,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:39:11,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1337344503, now seen corresponding path program 1 times [2022-11-20 11:39:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167175000] [2022-11-20 11:39:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167175000] [2022-11-20 11:39:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167175000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:11,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:11,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:39:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652572048] [2022-11-20 11:39:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:11,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:39:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:39:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:39:11,568 INFO L87 Difference]: Start difference. First operand 354 states and 808 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:12,422 INFO L93 Difference]: Finished difference Result 510 states and 1131 transitions. [2022-11-20 11:39:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:39:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:39:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:12,425 INFO L225 Difference]: With dead ends: 510 [2022-11-20 11:39:12,425 INFO L226 Difference]: Without dead ends: 510 [2022-11-20 11:39:12,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:39:12,426 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:12,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:39:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-20 11:39:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 424. [2022-11-20 11:39:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 2.3636363636363638) internal successors, (988), 423 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 988 transitions. [2022-11-20 11:39:12,445 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 988 transitions. Word has length 19 [2022-11-20 11:39:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:12,445 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 988 transitions. [2022-11-20 11:39:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 988 transitions. [2022-11-20 11:39:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:39:12,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:12,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:39:12,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1337344504, now seen corresponding path program 1 times [2022-11-20 11:39:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932794394] [2022-11-20 11:39:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:12,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:12,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:12,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932794394] [2022-11-20 11:39:12,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932794394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:12,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:12,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:39:12,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951994506] [2022-11-20 11:39:12,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:12,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:39:12,567 INFO L87 Difference]: Start difference. First operand 424 states and 988 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:12,740 INFO L93 Difference]: Finished difference Result 507 states and 1189 transitions. [2022-11-20 11:39:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:39:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:12,743 INFO L225 Difference]: With dead ends: 507 [2022-11-20 11:39:12,743 INFO L226 Difference]: Without dead ends: 507 [2022-11-20 11:39:12,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:39:12,745 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 111 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:12,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:12,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-20 11:39:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 418. [2022-11-20 11:39:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 2.348668280871671) internal successors, (970), 417 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 970 transitions. [2022-11-20 11:39:12,760 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 970 transitions. Word has length 19 [2022-11-20 11:39:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 970 transitions. [2022-11-20 11:39:12,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 970 transitions. [2022-11-20 11:39:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:39:12,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:12,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:39:12,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 723421545, now seen corresponding path program 1 times [2022-11-20 11:39:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862905292] [2022-11-20 11:39:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:12,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862905292] [2022-11-20 11:39:12,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862905292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244904167] [2022-11-20 11:39:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:12,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:12,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:12,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:39:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:39:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:13,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:13,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244904167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:13,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:13,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:39:13,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398043744] [2022-11-20 11:39:13,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:13,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:13,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:13,007 INFO L87 Difference]: Start difference. First operand 418 states and 970 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:13,108 INFO L93 Difference]: Finished difference Result 602 states and 1357 transitions. [2022-11-20 11:39:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:39:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:13,112 INFO L225 Difference]: With dead ends: 602 [2022-11-20 11:39:13,112 INFO L226 Difference]: Without dead ends: 602 [2022-11-20 11:39:13,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:13,113 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:13,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-20 11:39:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 484. [2022-11-20 11:39:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 477 states have (on average 2.291404612159329) internal successors, (1093), 483 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1093 transitions. [2022-11-20 11:39:13,129 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1093 transitions. Word has length 20 [2022-11-20 11:39:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:13,130 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 1093 transitions. [2022-11-20 11:39:13,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1093 transitions. [2022-11-20 11:39:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:39:13,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:13,131 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 11:39:13,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:13,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1210431682, now seen corresponding path program 1 times [2022-11-20 11:39:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42055772] [2022-11-20 11:39:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42055772] [2022-11-20 11:39:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42055772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916331596] [2022-11-20 11:39:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:13,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:13,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:39:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:39:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:13,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:13,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916331596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:13,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:13,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-20 11:39:13,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88782741] [2022-11-20 11:39:13,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:13,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:39:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:13,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:39:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:39:13,756 INFO L87 Difference]: Start difference. First operand 484 states and 1093 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:14,170 INFO L93 Difference]: Finished difference Result 1032 states and 2257 transitions. [2022-11-20 11:39:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:39:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:39:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:14,176 INFO L225 Difference]: With dead ends: 1032 [2022-11-20 11:39:14,176 INFO L226 Difference]: Without dead ends: 1032 [2022-11-20 11:39:14,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:39:14,177 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 202 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:14,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:39:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-11-20 11:39:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 696. [2022-11-20 11:39:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 689 states have (on average 2.294629898403483) internal successors, (1581), 695 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1581 transitions. [2022-11-20 11:39:14,206 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1581 transitions. Word has length 20 [2022-11-20 11:39:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:14,207 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1581 transitions. [2022-11-20 11:39:14,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1581 transitions. [2022-11-20 11:39:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 11:39:14,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:14,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:14,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:14,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:39:14,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:14,420 INFO L85 PathProgramCache]: Analyzing trace with hash 992748458, now seen corresponding path program 1 times [2022-11-20 11:39:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697204807] [2022-11-20 11:39:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:15,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697204807] [2022-11-20 11:39:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697204807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:15,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:15,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:39:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793120621] [2022-11-20 11:39:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:15,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:39:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:39:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:39:15,302 INFO L87 Difference]: Start difference. First operand 696 states and 1581 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:16,138 INFO L93 Difference]: Finished difference Result 832 states and 1871 transitions. [2022-11-20 11:39:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:39:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 11:39:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:16,142 INFO L225 Difference]: With dead ends: 832 [2022-11-20 11:39:16,142 INFO L226 Difference]: Without dead ends: 832 [2022-11-20 11:39:16,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:39:16,143 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 151 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:16,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 13 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:39:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-20 11:39:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 748. [2022-11-20 11:39:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 741 states have (on average 2.309041835357625) internal successors, (1711), 747 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1711 transitions. [2022-11-20 11:39:16,164 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1711 transitions. Word has length 21 [2022-11-20 11:39:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:16,165 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1711 transitions. [2022-11-20 11:39:16,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1711 transitions. [2022-11-20 11:39:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:39:16,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:16,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:39:16,167 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1113889011, now seen corresponding path program 1 times [2022-11-20 11:39:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:16,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244682615] [2022-11-20 11:39:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:16,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244682615] [2022-11-20 11:39:16,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244682615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865427026] [2022-11-20 11:39:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:16,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:16,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:16,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:39:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:39:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:16,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:16,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865427026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:16,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:16,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:39:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271690842] [2022-11-20 11:39:16,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:39:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:39:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:16,405 INFO L87 Difference]: Start difference. First operand 748 states and 1711 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:16,649 INFO L93 Difference]: Finished difference Result 1714 states and 3749 transitions. [2022-11-20 11:39:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:39:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:39:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:16,658 INFO L225 Difference]: With dead ends: 1714 [2022-11-20 11:39:16,660 INFO L226 Difference]: Without dead ends: 1714 [2022-11-20 11:39:16,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:39:16,661 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:16,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 5 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-11-20 11:39:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1666. [2022-11-20 11:39:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1659 states have (on average 2.234478601567209) internal successors, (3707), 1665 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3707 transitions. [2022-11-20 11:39:16,714 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3707 transitions. Word has length 23 [2022-11-20 11:39:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:16,715 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 3707 transitions. [2022-11-20 11:39:16,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3707 transitions. [2022-11-20 11:39:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:39:16,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:16,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:16,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:39:16,925 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 948669403, now seen corresponding path program 1 times [2022-11-20 11:39:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166627152] [2022-11-20 11:39:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:16,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:39:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166627152] [2022-11-20 11:39:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166627152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:16,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:16,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510767307] [2022-11-20 11:39:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:16,977 INFO L87 Difference]: Start difference. First operand 1666 states and 3707 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:17,085 INFO L93 Difference]: Finished difference Result 1840 states and 4017 transitions. [2022-11-20 11:39:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 11:39:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:17,094 INFO L225 Difference]: With dead ends: 1840 [2022-11-20 11:39:17,095 INFO L226 Difference]: Without dead ends: 1840 [2022-11-20 11:39:17,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:17,096 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:17,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:39:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-11-20 11:39:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1600. [2022-11-20 11:39:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1593 states have (on average 2.1814187068424356) internal successors, (3475), 1599 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3475 transitions. [2022-11-20 11:39:17,146 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3475 transitions. Word has length 24 [2022-11-20 11:39:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:17,149 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 3475 transitions. [2022-11-20 11:39:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3475 transitions. [2022-11-20 11:39:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:39:17,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:17,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:17,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:39:17,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash -173931243, now seen corresponding path program 1 times [2022-11-20 11:39:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:17,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212503841] [2022-11-20 11:39:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:17,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:17,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212503841] [2022-11-20 11:39:17,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212503841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873814781] [2022-11-20 11:39:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:17,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:17,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:17,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:39:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:17,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:39:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:18,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:39:18,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-11-20 11:39:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:19,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873814781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:19,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:19,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2022-11-20 11:39:19,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020761060] [2022-11-20 11:39:19,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:19,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:39:19,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:19,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:39:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:39:19,187 INFO L87 Difference]: Start difference. First operand 1600 states and 3475 transitions. Second operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:23,682 INFO L93 Difference]: Finished difference Result 2796 states and 5955 transitions. [2022-11-20 11:39:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:39:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 11:39:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:23,696 INFO L225 Difference]: With dead ends: 2796 [2022-11-20 11:39:23,696 INFO L226 Difference]: Without dead ends: 2796 [2022-11-20 11:39:23,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1337, Invalid=5635, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 11:39:23,699 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 831 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:23,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 0 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 11:39:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2022-11-20 11:39:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 1752. [2022-11-20 11:39:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1745 states have (on average 2.22865329512894) internal successors, (3889), 1751 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3889 transitions. [2022-11-20 11:39:23,767 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3889 transitions. Word has length 24 [2022-11-20 11:39:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:23,767 INFO L495 AbstractCegarLoop]: Abstraction has 1752 states and 3889 transitions. [2022-11-20 11:39:23,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3889 transitions. [2022-11-20 11:39:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:39:23,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:23,769 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:23,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:23,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:23,980 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash -173929930, now seen corresponding path program 1 times [2022-11-20 11:39:23,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:23,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226519005] [2022-11-20 11:39:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226519005] [2022-11-20 11:39:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226519005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574214635] [2022-11-20 11:39:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:24,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:24,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:39:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:39:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:39:24,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:24,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574214635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:24,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-20 11:39:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543118303] [2022-11-20 11:39:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:24,326 INFO L87 Difference]: Start difference. First operand 1752 states and 3889 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:24,550 INFO L93 Difference]: Finished difference Result 1970 states and 4262 transitions. [2022-11-20 11:39:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:39:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 11:39:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:24,603 INFO L225 Difference]: With dead ends: 1970 [2022-11-20 11:39:24,604 INFO L226 Difference]: Without dead ends: 1970 [2022-11-20 11:39:24,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:24,605 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:24,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:39:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-20 11:39:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1802. [2022-11-20 11:39:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1795 states have (on average 2.2094707520891363) internal successors, (3966), 1801 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3966 transitions. [2022-11-20 11:39:24,677 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3966 transitions. Word has length 24 [2022-11-20 11:39:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:24,678 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 3966 transitions. [2022-11-20 11:39:24,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3966 transitions. [2022-11-20 11:39:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:39:24,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:24,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:24,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:24,888 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1136577317, now seen corresponding path program 2 times [2022-11-20 11:39:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188986537] [2022-11-20 11:39:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:25,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188986537] [2022-11-20 11:39:25,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188986537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890808784] [2022-11-20 11:39:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:25,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:25,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:25,395 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:25,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:39:25,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:39:25,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:39:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:26,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890808784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:26,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:26,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2022-11-20 11:39:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78879587] [2022-11-20 11:39:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:39:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:39:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:39:26,011 INFO L87 Difference]: Start difference. First operand 1802 states and 3966 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:27,415 INFO L93 Difference]: Finished difference Result 2356 states and 5079 transitions. [2022-11-20 11:39:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:39:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 11:39:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:27,425 INFO L225 Difference]: With dead ends: 2356 [2022-11-20 11:39:27,426 INFO L226 Difference]: Without dead ends: 2356 [2022-11-20 11:39:27,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:39:27,427 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 250 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:27,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 0 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:39:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-20 11:39:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1942. [2022-11-20 11:39:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1935 states have (on average 2.1891472868217052) internal successors, (4236), 1941 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 4236 transitions. [2022-11-20 11:39:27,490 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 4236 transitions. Word has length 26 [2022-11-20 11:39:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:27,491 INFO L495 AbstractCegarLoop]: Abstraction has 1942 states and 4236 transitions. [2022-11-20 11:39:27,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 4236 transitions. [2022-11-20 11:39:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:39:27,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:27,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 11:39:27,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:39:27,700 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -718385101, now seen corresponding path program 2 times [2022-11-20 11:39:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399837129] [2022-11-20 11:39:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:28,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:28,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399837129] [2022-11-20 11:39:28,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399837129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:28,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306214762] [2022-11-20 11:39:28,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:28,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:28,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:28,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:39:28,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:39:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 11:39:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:29,011 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 11:39:29,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-11-20 11:39:29,027 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:39:29,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:39:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:30,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306214762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:31,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:31,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-11-20 11:39:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750792962] [2022-11-20 11:39:31,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 11:39:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 11:39:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:39:31,588 INFO L87 Difference]: Start difference. First operand 1942 states and 4236 transitions. Second operand has 37 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:33,342 INFO L93 Difference]: Finished difference Result 1967 states and 4291 transitions. [2022-11-20 11:39:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:39:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 11:39:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:33,364 INFO L225 Difference]: With dead ends: 1967 [2022-11-20 11:39:33,364 INFO L226 Difference]: Without dead ends: 1967 [2022-11-20 11:39:33,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=380, Invalid=2700, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:39:33,368 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:33,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 399 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-20 11:39:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-20 11:39:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1961. [2022-11-20 11:39:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1954 states have (on average 2.190890481064483) internal successors, (4281), 1960 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 4281 transitions. [2022-11-20 11:39:33,425 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 4281 transitions. Word has length 27 [2022-11-20 11:39:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:33,426 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 4281 transitions. [2022-11-20 11:39:33,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 4281 transitions. [2022-11-20 11:39:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:39:33,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:33,428 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 11:39:33,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:33,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:33,635 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash -795101488, now seen corresponding path program 1 times [2022-11-20 11:39:33,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79610119] [2022-11-20 11:39:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79610119] [2022-11-20 11:39:34,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79610119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842625211] [2022-11-20 11:39:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:34,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:34,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:34,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:39:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:39:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:35,045 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:39:35,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 11:39:35,078 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:39:35,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-20 11:39:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:35,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:36,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842625211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:36,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:36,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2022-11-20 11:39:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530930536] [2022-11-20 11:39:36,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:39:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:39:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:39:36,244 INFO L87 Difference]: Start difference. First operand 1961 states and 4281 transitions. Second operand has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:38,895 INFO L93 Difference]: Finished difference Result 4072 states and 8571 transitions. [2022-11-20 11:39:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:39:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 11:39:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:38,909 INFO L225 Difference]: With dead ends: 4072 [2022-11-20 11:39:38,909 INFO L226 Difference]: Without dead ends: 4072 [2022-11-20 11:39:38,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:39:38,911 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 613 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:38,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 0 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:39:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2022-11-20 11:39:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 2682. [2022-11-20 11:39:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2675 states have (on average 2.1985046728971964) internal successors, (5881), 2681 states have internal predecessors, (5881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 5881 transitions. [2022-11-20 11:39:39,007 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 5881 transitions. Word has length 28 [2022-11-20 11:39:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:39,008 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 5881 transitions. [2022-11-20 11:39:39,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 5881 transitions. [2022-11-20 11:39:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:39:39,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:39,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:39,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:39,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:39:39,223 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1329011032, now seen corresponding path program 2 times [2022-11-20 11:39:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332458327] [2022-11-20 11:39:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:39,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332458327] [2022-11-20 11:39:40,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332458327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197974129] [2022-11-20 11:39:40,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:39:40,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:40,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:40,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:40,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:39:40,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:39:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 11:39:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:40,755 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:39:40,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:39:41,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:39:41,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 58 [2022-11-20 11:39:42,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-20 11:39:44,131 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_15_58 Int) (aux_div_v_arrayElimCell_15_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_15_58 4294967296))) (and (< aux_mod_v_arrayElimCell_15_58 4294967296) (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_15_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|) (<= (+ .cse0 aux_mod_v_arrayElimCell_15_58 4294967297) 0) (<= 4294966496 aux_mod_v_arrayElimCell_15_58) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_15_58))))) is different from true [2022-11-20 11:39:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:39:44,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:44,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197974129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:44,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:44,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 30 [2022-11-20 11:39:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668706308] [2022-11-20 11:39:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:44,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:39:44,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:44,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:39:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=862, Unknown=1, NotChecked=58, Total=992 [2022-11-20 11:39:44,135 INFO L87 Difference]: Start difference. First operand 2682 states and 5881 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:54,268 INFO L93 Difference]: Finished difference Result 3508 states and 7651 transitions. [2022-11-20 11:39:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:39:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 11:39:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:54,281 INFO L225 Difference]: With dead ends: 3508 [2022-11-20 11:39:54,282 INFO L226 Difference]: Without dead ends: 3508 [2022-11-20 11:39:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=218, Invalid=1853, Unknown=3, NotChecked=88, Total=2162 [2022-11-20 11:39:54,283 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:54,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 787 Invalid, 0 Unknown, 110 Unchecked, 1.5s Time] [2022-11-20 11:39:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2022-11-20 11:39:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3287. [2022-11-20 11:39:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3280 states have (on average 2.210670731707317) internal successors, (7251), 3286 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 7251 transitions. [2022-11-20 11:39:54,390 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 7251 transitions. Word has length 28 [2022-11-20 11:39:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:54,390 INFO L495 AbstractCegarLoop]: Abstraction has 3287 states and 7251 transitions. [2022-11-20 11:39:54,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 7251 transitions. [2022-11-20 11:39:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:39:54,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:54,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:54,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:54,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:54,600 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1750330925, now seen corresponding path program 1 times [2022-11-20 11:39:54,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:54,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713654844] [2022-11-20 11:39:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:54,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713654844] [2022-11-20 11:39:54,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713654844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370890832] [2022-11-20 11:39:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:54,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:54,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:54,727 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:54,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:39:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:54,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:55,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370890832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:55,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:55,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:39:55,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587783378] [2022-11-20 11:39:55,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:55,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:39:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:39:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:39:55,127 INFO L87 Difference]: Start difference. First operand 3287 states and 7251 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:55,597 INFO L93 Difference]: Finished difference Result 5325 states and 10926 transitions. [2022-11-20 11:39:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:39:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:39:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:55,617 INFO L225 Difference]: With dead ends: 5325 [2022-11-20 11:39:55,617 INFO L226 Difference]: Without dead ends: 5325 [2022-11-20 11:39:55,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:39:55,620 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 154 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 12 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:39:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2022-11-20 11:39:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 5277. [2022-11-20 11:39:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5268 states have (on average 2.067198177676538) internal successors, (10890), 5276 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 10890 transitions. [2022-11-20 11:39:55,777 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 10890 transitions. Word has length 29 [2022-11-20 11:39:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:55,778 INFO L495 AbstractCegarLoop]: Abstraction has 5277 states and 10890 transitions. [2022-11-20 11:39:55,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 10890 transitions. [2022-11-20 11:39:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:39:55,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:55,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:55,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:55,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:55,987 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:39:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1750331266, now seen corresponding path program 1 times [2022-11-20 11:39:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:55,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029880718] [2022-11-20 11:39:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029880718] [2022-11-20 11:39:57,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029880718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763595437] [2022-11-20 11:39:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:57,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:57,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:39:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 11:39:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:58,157 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:39:58,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:39:59,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:39:59,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-11-20 11:40:00,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-20 11:40:02,434 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_19_58 Int) (aux_mod_v_arrayElimCell_19_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_19_58 4294967296))) (and (< aux_mod_v_arrayElimCell_19_58 4294967296) (<= (+ .cse0 aux_mod_v_arrayElimCell_19_58 4294967297) 0) (<= 4294966496 aux_mod_v_arrayElimCell_19_58) (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_19_58) 4294967295) 4294967296)) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_19_58))))) is different from true [2022-11-20 11:40:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:02,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:03,196 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_893) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2022-11-20 11:40:03,208 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_893) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-20 11:40:03,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:03,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 11:40:03,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:03,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 11:40:03,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:40:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-20 11:40:03,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763595437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:03,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:03,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2022-11-20 11:40:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701541819] [2022-11-20 11:40:03,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:03,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:40:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:40:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1827, Unknown=6, NotChecked=264, Total=2256 [2022-11-20 11:40:03,733 INFO L87 Difference]: Start difference. First operand 5277 states and 10890 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:21,457 INFO L93 Difference]: Finished difference Result 12416 states and 25003 transitions. [2022-11-20 11:40:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 11:40:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:40:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:21,506 INFO L225 Difference]: With dead ends: 12416 [2022-11-20 11:40:21,507 INFO L226 Difference]: Without dead ends: 12416 [2022-11-20 11:40:21,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 26 SyntacticMatches, 10 SemanticMatches, 103 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=888, Invalid=9408, Unknown=18, NotChecked=606, Total=10920 [2022-11-20 11:40:21,511 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 374 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4667 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1588 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:21,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 0 Invalid, 6270 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 4667 Invalid, 0 Unknown, 1588 Unchecked, 5.3s Time] [2022-11-20 11:40:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12416 states. [2022-11-20 11:40:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12416 to 5691. [2022-11-20 11:40:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 5682 states have (on average 2.0656458993312214) internal successors, (11737), 5690 states have internal predecessors, (11737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 11737 transitions. [2022-11-20 11:40:21,796 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 11737 transitions. Word has length 29 [2022-11-20 11:40:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:21,796 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 11737 transitions. [2022-11-20 11:40:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 11737 transitions. [2022-11-20 11:40:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:40:21,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:21,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:21,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:22,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:40:22,008 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:40:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash 254204856, now seen corresponding path program 2 times [2022-11-20 11:40:22,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:22,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111854588] [2022-11-20 11:40:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:23,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111854588] [2022-11-20 11:40:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111854588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237999165] [2022-11-20 11:40:23,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:40:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:23,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:23,495 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:23,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:40:23,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:40:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 11:40:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:23,698 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:40:23,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:40:24,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:40:24,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-20 11:40:25,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-20 11:40:27,484 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_26_58 Int) (aux_div_v_arrayElimCell_26_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_26_58 4294967296))) (and (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_26_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|) (< aux_mod_v_arrayElimCell_26_58 4294967296) (<= (+ aux_mod_v_arrayElimCell_26_58 4294967297 .cse0) 0) (<= 4294966496 aux_mod_v_arrayElimCell_26_58) (< 0 (+ 8589934593 aux_mod_v_arrayElimCell_26_58 .cse0))))) is different from true [2022-11-20 11:40:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:27,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:28,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:28,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 11:40:28,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:28,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 11:40:28,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:40:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237999165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:29,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:29,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2022-11-20 11:40:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459052445] [2022-11-20 11:40:29,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:40:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:40:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1839, Unknown=13, NotChecked=86, Total=2070 [2022-11-20 11:40:29,129 INFO L87 Difference]: Start difference. First operand 5691 states and 11737 transitions. Second operand has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:45,458 INFO L93 Difference]: Finished difference Result 5883 states and 12075 transitions. [2022-11-20 11:40:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:40:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:40:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:45,476 INFO L225 Difference]: With dead ends: 5883 [2022-11-20 11:40:45,476 INFO L226 Difference]: Without dead ends: 5883 [2022-11-20 11:40:45,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=702, Invalid=4259, Unknown=13, NotChecked=138, Total=5112 [2022-11-20 11:40:45,479 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 729 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:45,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 2 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2294 Invalid, 0 Unknown, 120 Unchecked, 3.1s Time] [2022-11-20 11:40:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2022-11-20 11:40:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 5654. [2022-11-20 11:40:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5645 states have (on average 2.0643046944198407) internal successors, (11653), 5653 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 11653 transitions. [2022-11-20 11:40:45,626 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 11653 transitions. Word has length 29 [2022-11-20 11:40:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:45,626 INFO L495 AbstractCegarLoop]: Abstraction has 5654 states and 11653 transitions. [2022-11-20 11:40:45,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 11653 transitions. [2022-11-20 11:40:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:40:45,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:45,629 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:45,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:45,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:40:45,842 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:40:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:45,843 INFO L85 PathProgramCache]: Analyzing trace with hash -520424830, now seen corresponding path program 2 times [2022-11-20 11:40:45,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:45,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436182797] [2022-11-20 11:40:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:40:46,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436182797] [2022-11-20 11:40:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436182797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65336088] [2022-11-20 11:40:46,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:40:46,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:46,030 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:40:46,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:40:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:40:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:40:46,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:40:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65336088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:46,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:46,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-20 11:40:46,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738963614] [2022-11-20 11:40:46,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:40:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:40:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:40:46,515 INFO L87 Difference]: Start difference. First operand 5654 states and 11653 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:47,134 INFO L93 Difference]: Finished difference Result 6836 states and 13906 transitions. [2022-11-20 11:40:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:40:47,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 11:40:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:47,152 INFO L225 Difference]: With dead ends: 6836 [2022-11-20 11:40:47,153 INFO L226 Difference]: Without dead ends: 6836 [2022-11-20 11:40:47,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:40:47,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 223 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:47,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 0 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:40:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-11-20 11:40:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 5976. [2022-11-20 11:40:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5967 states have (on average 2.0574828221887045) internal successors, (12277), 5975 states have internal predecessors, (12277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 12277 transitions. [2022-11-20 11:40:47,308 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 12277 transitions. Word has length 31 [2022-11-20 11:40:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:47,309 INFO L495 AbstractCegarLoop]: Abstraction has 5976 states and 12277 transitions. [2022-11-20 11:40:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 12277 transitions. [2022-11-20 11:40:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:40:47,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:47,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:47,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:40:47,521 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:40:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1788005313, now seen corresponding path program 2 times [2022-11-20 11:40:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:47,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810418228] [2022-11-20 11:40:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810418228] [2022-11-20 11:40:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810418228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707362214] [2022-11-20 11:40:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:40:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:48,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:40:48,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:40:48,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:40:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:48,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 11:40:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:49,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:50,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707362214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:50,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:50,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 30 [2022-11-20 11:40:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386251517] [2022-11-20 11:40:50,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:40:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:40:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:40:50,232 INFO L87 Difference]: Start difference. First operand 5976 states and 12277 transitions. Second operand has 32 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:54,193 INFO L93 Difference]: Finished difference Result 8401 states and 17056 transitions. [2022-11-20 11:40:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:40:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 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 31 [2022-11-20 11:40:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:54,206 INFO L225 Difference]: With dead ends: 8401 [2022-11-20 11:40:54,206 INFO L226 Difference]: Without dead ends: 8401 [2022-11-20 11:40:54,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:40:54,207 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 446 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:54,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 0 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 11:40:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2022-11-20 11:40:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 7186. [2022-11-20 11:40:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7186 states, 7177 states have (on average 2.056848265291905) internal successors, (14762), 7185 states have internal predecessors, (14762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7186 states to 7186 states and 14762 transitions. [2022-11-20 11:40:54,397 INFO L78 Accepts]: Start accepts. Automaton has 7186 states and 14762 transitions. Word has length 31 [2022-11-20 11:40:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:54,398 INFO L495 AbstractCegarLoop]: Abstraction has 7186 states and 14762 transitions. [2022-11-20 11:40:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7186 states and 14762 transitions. [2022-11-20 11:40:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:40:54,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:54,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:54,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:54,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:40:54,608 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:40:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1549235757, now seen corresponding path program 1 times [2022-11-20 11:40:54,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:54,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028916703] [2022-11-20 11:40:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:40:55,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:55,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028916703] [2022-11-20 11:40:55,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028916703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:55,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519637675] [2022-11-20 11:40:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:55,237 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:55,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:40:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:40:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:56,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:56,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:40:56,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-11-20 11:40:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:40:57,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519637675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:40:57,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:40:57,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 33 [2022-11-20 11:40:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165451078] [2022-11-20 11:40:57,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:40:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:40:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:40:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:40:57,256 INFO L87 Difference]: Start difference. First operand 7186 states and 14762 transitions. Second operand has 35 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:41:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:41:03,057 INFO L93 Difference]: Finished difference Result 8498 states and 17153 transitions. [2022-11-20 11:41:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:41:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:41:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:41:03,071 INFO L225 Difference]: With dead ends: 8498 [2022-11-20 11:41:03,071 INFO L226 Difference]: Without dead ends: 8498 [2022-11-20 11:41:03,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=889, Invalid=3533, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:41:03,073 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 485 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:41:03,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 0 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 11:41:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2022-11-20 11:41:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 6974. [2022-11-20 11:41:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6967 states have (on average 2.05454284483996) internal successors, (14314), 6973 states have internal predecessors, (14314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:41:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 14314 transitions. [2022-11-20 11:41:03,272 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 14314 transitions. Word has length 34 [2022-11-20 11:41:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:41:03,273 INFO L495 AbstractCegarLoop]: Abstraction has 6974 states and 14314 transitions. [2022-11-20 11:41:03,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:41:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 14314 transitions. [2022-11-20 11:41:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:41:03,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:41:03,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:41:03,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:41:03,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:03,483 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:41:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:41:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1537991814, now seen corresponding path program 1 times [2022-11-20 11:41:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:41:03,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143300957] [2022-11-20 11:41:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:41:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:41:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:41:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143300957] [2022-11-20 11:41:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143300957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:41:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347825170] [2022-11-20 11:41:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:41:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:41:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:06,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:41:06,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:41:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:41:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 11:41:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:41:06,393 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:41:06,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-20 11:41:06,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:41:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:41:07,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-20 11:41:07,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-11-20 11:41:09,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-20 11:41:11,203 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_38_58 Int) (aux_div_v_arrayElimCell_38_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_38_58 4294967296))) (and (<= (+ .cse0 aux_mod_v_arrayElimCell_38_58 4294967297) 0) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_38_58)) (< aux_mod_v_arrayElimCell_38_58 4294967296) (<= 4294966496 aux_mod_v_arrayElimCell_38_58) (= (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_38_58)) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|)))) is different from true [2022-11-20 11:41:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:41:11,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:14,106 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-20 11:41:14,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-20 11:41:14,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:41:14,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-11-20 11:41:14,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:41:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:41:16,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347825170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:41:16,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:41:16,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 21] total 66 [2022-11-20 11:41:16,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051377635] [2022-11-20 11:41:16,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:41:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:41:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3949, Unknown=30, NotChecked=130, Total=4556 [2022-11-20 11:41:16,770 INFO L87 Difference]: Start difference. First operand 6974 states and 14314 transitions. Second operand has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:41:47,611 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|))) (and (or (= |c_t1Thread1of1ForFork0_inc_top_#t~post31#1| 0) (forall ((v_ArrVal_1219 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1219) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296))))) (let ((.cse1 (+ |c_t1Thread1of1ForFork0_inc_top_#t~post31#1| 1))) (or (forall ((v_ArrVal_1219 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_95| Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_168| Int) (v_ArrVal_1218 Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_95|) v_ArrVal_1218)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1219) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset|)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| .cse1) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_95| |c_~#arr~0.offset|))) (= .cse1 0))))) is different from false [2022-11-20 11:41:52,726 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~top~0 4))) (and (or (forall ((v_ArrVal_1219 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1219) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse0 (- 8))) 4294967296) 4294967294))) (= c_~top~0 1)) (or (= c_~top~0 0) (forall ((v_ArrVal_1219 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_95| Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_168| Int) (v_ArrVal_1218 Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_95|) v_ArrVal_1218)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1219) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) .cse0)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_95| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| c_~top~0)))))) is different from false [2022-11-20 11:42:48,142 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (select |c_#memory_int| |c_~#arr~0.base|)) (.cse8 (select |c_#memory_int| |c_t2Thread1of1ForFork1_pop_~stack#1.base|))) (let ((.cse11 (* |c_t2Thread1of1ForFork1_pop_#t~ret36#1| 4)) (.cse1 (* c_~top~0 4)) (.cse12 (select .cse8 0)) (.cse13 (select .cse9 0))) (let ((.cse3 (<= .cse13 799)) (.cse4 (<= 0 .cse13)) (.cse5 (<= 0 .cse12)) (.cse6 (<= .cse12 799)) (.cse2 (< .cse1 4)) (.cse10 (= 0 |c_t2Thread1of1ForFork1_pop_~stack#1.offset|)) (.cse0 (select .cse8 (+ .cse11 |c_t2Thread1of1ForFork1_pop_~stack#1.offset|)))) (and (not (= (mod .cse0 4294967296) 4294967294)) (<= .cse1 0) (or .cse2 (and .cse3 .cse4 (not (= |c_ULTIMATE.start_main_~#id2~0#1.base| |c_~#arr~0.base|)))) (= |c_t2Thread1of1ForFork1_pop_#t~ret36#1| c_~top~0) (<= .cse1 4) (or (< .cse1 0) (and .cse5 .cse6)) (or (let ((.cse7 (select (select |c_#memory_int| |c_t2Thread1of1ForFork1_pop_#in~stack#1.base|) 0))) (and (<= 0 .cse7) (<= .cse7 799))) .cse2) (or .cse2 (and .cse3 .cse4 (= (select |c_#length| |c_ULTIMATE.start_main_~#id2~0#1.base|) 4))) (= |c_~#arr~0.offset| 0) (or (and .cse5 (= |c_t2Thread1of1ForFork1_pop_~stack#1.base| |c_~#arr~0.base|) .cse6) .cse2) (not (= (mod (select .cse8 (+ .cse1 |c_t2Thread1of1ForFork1_pop_~stack#1.offset|)) 4294967296) 4294967294)) (or (= c_~top~0 0) (forall ((v_ArrVal_1219 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_95| Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_168| Int) (v_ArrVal_1218 Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store .cse9 (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_95|) v_ArrVal_1218)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1219) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) .cse1)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_95| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_168| c_~top~0)))) .cse10 (or (and (<= (+ .cse11 1 |c_t2Thread1of1ForFork1_pop_~stack#1.offset|) 0) .cse10) (and (<= .cse0 799) (<= 0 .cse0))) (= |c_t2Thread1of1ForFork1_pop_#in~stack#1.offset| 0))))) is different from false [2022-11-20 11:42:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:54,081 INFO L93 Difference]: Finished difference Result 11119 states and 21829 transitions. [2022-11-20 11:42:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-20 11:42:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-20 11:42:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:54,100 INFO L225 Difference]: With dead ends: 11119 [2022-11-20 11:42:54,100 INFO L226 Difference]: Without dead ends: 11119 [2022-11-20 11:42:54,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 233 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 19880 ImplicationChecksByTransitivity, 93.1s TimeCoverageRelationStatistics Valid=5670, Invalid=47325, Unknown=151, NotChecked=1844, Total=54990 [2022-11-20 11:42:54,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1331 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9004 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 9004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5324 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:54,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 0 Invalid, 14462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [134 Valid, 9004 Invalid, 0 Unknown, 5324 Unchecked, 13.0s Time] [2022-11-20 11:42:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-11-20 11:42:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 7412. [2022-11-20 11:42:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7405 states have (on average 2.050101282916948) internal successors, (15181), 7411 states have internal predecessors, (15181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 15181 transitions. [2022-11-20 11:42:54,329 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 15181 transitions. Word has length 36 [2022-11-20 11:42:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:54,329 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 15181 transitions. [2022-11-20 11:42:54,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 15181 transitions. [2022-11-20 11:42:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:42:54,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:54,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:54,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:54,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:54,549 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:42:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1414973486, now seen corresponding path program 2 times [2022-11-20 11:42:54,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356752805] [2022-11-20 11:42:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:57,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:57,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356752805] [2022-11-20 11:42:57,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356752805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:57,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053839596] [2022-11-20 11:42:57,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:42:57,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:57,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:57,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:42:57,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:42:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:42:57,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 11:42:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:57,797 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:42:57,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:42:58,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:42:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:59,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 44 [2022-11-20 11:43:00,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2022-11-20 11:43:06,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:06,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 68 [2022-11-20 11:43:08,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_47_58 Int) (aux_div_v_arrayElimCell_47_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_47_58 4294967296))) (and (<= (+ aux_mod_v_arrayElimCell_47_58 4294967297 .cse0) 0) (<= 4294966496 aux_mod_v_arrayElimCell_47_58) (= (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_47_58) 4294967295) 4294967296) |c_t2Thread1of1ForFork1_#t~ret44#1|) (< aux_mod_v_arrayElimCell_47_58 4294967296) (< 0 (+ 8589934593 aux_mod_v_arrayElimCell_47_58 .cse0))))) is different from true [2022-11-20 11:43:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:43:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:09,323 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) (- 8))) 4294967296) 4294967294))) is different from false [2022-11-20 11:43:09,533 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-20 11:43:09,544 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork0_push_~stack#1.offset| (* |c_t1Thread1of1ForFork0_push_#t~ret34#1| 4)) |c_t1Thread1of1ForFork0_push_~x#1|)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-20 11:43:13,579 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 11:43:13,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 62 [2022-11-20 11:43:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:43:13,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:13,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 109 [2022-11-20 11:43:13,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:43:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 11:43:18,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053839596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:18,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:18,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 70 [2022-11-20 11:43:18,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399939198] [2022-11-20 11:43:18,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:18,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 11:43:18,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:18,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 11:43:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4270, Unknown=39, NotChecked=540, Total=5112 [2022-11-20 11:43:18,473 INFO L87 Difference]: Start difference. First operand 7412 states and 15181 transitions. Second operand has 72 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 71 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:40,441 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~top~0 4))) (and (forall ((|v_t1Thread1of1ForFork0_push_#t~ret34#1_175| Int) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_98| Int) (|aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| Int) (v_ArrVal_1289 (Array Int Int))) (or (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_175| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_98|) (mod |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| 4294967296))) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse0)) 4294967296))) (<= 800 |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54|) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_98| |c_~#arr~0.offset|) (< |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| 0) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_175| (+ c_~top~0 1)))) (forall ((v_ArrVal_1289 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) .cse0)) 4294967296)))))) is different from false [2022-11-20 11:43:41,115 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|))) (and (forall ((|v_t1Thread1of1ForFork0_push_#t~ret34#1_175| Int) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_98| Int) (|aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| Int) (v_ArrVal_1289 (Array Int Int))) (or (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_175| (+ |c_t1Thread1of1ForFork0_inc_top_#t~post31#1| 1)) (<= 800 |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54|) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_98| |c_~#arr~0.offset|) (< |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| 0) (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_175| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_98|) (mod |aux_mod_v_t1Thread1of1ForFork0_~tmp~0#1_116_54| 4294967296))) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset|)) 4294967296))))) (forall ((v_ArrVal_1289 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1289) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2022-11-20 11:45:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:23,012 INFO L93 Difference]: Finished difference Result 12305 states and 24159 transitions. [2022-11-20 11:45:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-11-20 11:45:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 71 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-20 11:45:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:23,039 INFO L225 Difference]: With dead ends: 12305 [2022-11-20 11:45:23,039 INFO L226 Difference]: Without dead ends: 12305 [2022-11-20 11:45:23,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 36 SyntacticMatches, 17 SemanticMatches, 250 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 22232 ImplicationChecksByTransitivity, 136.9s TimeCoverageRelationStatistics Valid=2855, Invalid=57292, Unknown=147, NotChecked=2958, Total=63252 [2022-11-20 11:45:23,045 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 797 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4466 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:23,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 0 Invalid, 9040 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 4537 Invalid, 0 Unknown, 4466 Unchecked, 6.0s Time] [2022-11-20 11:45:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2022-11-20 11:45:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 9648. [2022-11-20 11:45:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9648 states, 9641 states have (on average 2.0519655637382015) internal successors, (19783), 9647 states have internal predecessors, (19783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9648 states to 9648 states and 19783 transitions. [2022-11-20 11:45:23,322 INFO L78 Accepts]: Start accepts. Automaton has 9648 states and 19783 transitions. Word has length 36 [2022-11-20 11:45:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:23,323 INFO L495 AbstractCegarLoop]: Abstraction has 9648 states and 19783 transitions. [2022-11-20 11:45:23,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 71 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9648 states and 19783 transitions. [2022-11-20 11:45:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:45:23,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:23,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:23,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 11:45:23,535 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:45:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 267140550, now seen corresponding path program 3 times [2022-11-20 11:45:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:23,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893226277] [2022-11-20 11:45:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:23,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893226277] [2022-11-20 11:45:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893226277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811270545] [2022-11-20 11:45:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:45:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:29,251 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:29,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:45:29,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:45:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:29,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 11:45:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:29,665 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:45:29,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-20 11:45:30,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:45:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:45:31,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-20 11:45:31,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-11-20 11:45:33,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-20 11:45:35,743 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_57_58 Int) (aux_mod_v_arrayElimCell_57_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_57_58 4294967296))) (and (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_57_58) 4294967295) 4294967296)) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_57_58)) (< aux_mod_v_arrayElimCell_57_58 4294967296) (<= (+ .cse0 aux_mod_v_arrayElimCell_57_58 4294967297) 0) (<= 4294966496 aux_mod_v_arrayElimCell_57_58)))) is different from true [2022-11-20 11:45:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:45:35,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:37,563 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1359 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1359) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294))) is different from false [2022-11-20 11:45:37,572 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1359 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1359) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-20 11:45:39,082 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2022-11-20 11:45:39,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 62 [2022-11-20 11:45:39,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:39,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2022-11-20 11:45:39,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:45:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:45:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811270545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:39,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:39,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 67 [2022-11-20 11:45:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359879325] [2022-11-20 11:45:39,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-20 11:45:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-20 11:45:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3971, Unknown=40, NotChecked=390, Total=4692 [2022-11-20 11:45:39,783 INFO L87 Difference]: Start difference. First operand 9648 states and 19783 transitions. Second operand has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:28,645 INFO L93 Difference]: Finished difference Result 13795 states and 27765 transitions. [2022-11-20 11:46:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 11:46:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-20 11:46:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:28,672 INFO L225 Difference]: With dead ends: 13795 [2022-11-20 11:46:28,672 INFO L226 Difference]: Without dead ends: 13795 [2022-11-20 11:46:28,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 35 SyntacticMatches, 20 SemanticMatches, 132 ConstructedPredicates, 3 IntricatePredicates, 3 DeprecatedPredicates, 4921 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=1403, Invalid=15563, Unknown=76, NotChecked=780, Total=17822 [2022-11-20 11:46:28,674 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 613 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 7503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2874 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:28,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 5 Invalid, 7503 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 4600 Invalid, 0 Unknown, 2874 Unchecked, 10.4s Time] [2022-11-20 11:46:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13795 states. [2022-11-20 11:46:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13795 to 9933. [2022-11-20 11:46:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9933 states, 9926 states have (on average 2.0585331452750353) internal successors, (20433), 9932 states have internal predecessors, (20433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9933 states to 9933 states and 20433 transitions. [2022-11-20 11:46:28,930 INFO L78 Accepts]: Start accepts. Automaton has 9933 states and 20433 transitions. Word has length 36 [2022-11-20 11:46:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:28,931 INFO L495 AbstractCegarLoop]: Abstraction has 9933 states and 20433 transitions. [2022-11-20 11:46:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 9933 states and 20433 transitions. [2022-11-20 11:46:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:46:28,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:28,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:28,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:29,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:29,142 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:46:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1352124434, now seen corresponding path program 4 times [2022-11-20 11:46:29,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:29,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061520880] [2022-11-20 11:46:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:30,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:30,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061520880] [2022-11-20 11:46:30,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061520880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966350391] [2022-11-20 11:46:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:46:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:30,631 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:30,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:46:30,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:46:30,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 11:46:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:32,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:46:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:46:33,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 49 [2022-11-20 11:46:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:33,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:34,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-20 11:46:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:36,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966350391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:36,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:36,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18] total 58 [2022-11-20 11:46:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671186523] [2022-11-20 11:46:36,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:46:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:46:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=3252, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:46:36,742 INFO L87 Difference]: Start difference. First operand 9933 states and 20433 transitions. Second operand has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:49,282 INFO L93 Difference]: Finished difference Result 12124 states and 24381 transitions. [2022-11-20 11:46:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:46:49,287 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-20 11:46:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:49,310 INFO L225 Difference]: With dead ends: 12124 [2022-11-20 11:46:49,310 INFO L226 Difference]: Without dead ends: 12124 [2022-11-20 11:46:49,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 37 SyntacticMatches, 17 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3374 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1350, Invalid=9992, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:46:49,311 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 571 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3037 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:49,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1 Invalid, 5607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2554 Invalid, 0 Unknown, 3037 Unchecked, 3.0s Time] [2022-11-20 11:46:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12124 states. [2022-11-20 11:46:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12124 to 10879. [2022-11-20 11:46:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10879 states, 10872 states have (on average 2.0550036791758646) internal successors, (22342), 10878 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10879 states to 10879 states and 22342 transitions. [2022-11-20 11:46:49,514 INFO L78 Accepts]: Start accepts. Automaton has 10879 states and 22342 transitions. Word has length 36 [2022-11-20 11:46:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:49,515 INFO L495 AbstractCegarLoop]: Abstraction has 10879 states and 22342 transitions. [2022-11-20 11:46:49,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10879 states and 22342 transitions. [2022-11-20 11:46:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:46:49,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:49,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:49,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:49,728 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:46:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -200477010, now seen corresponding path program 5 times [2022-11-20 11:46:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:49,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436115649] [2022-11-20 11:46:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:52,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436115649] [2022-11-20 11:46:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436115649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195407643] [2022-11-20 11:46:52,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:46:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:52,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:46:52,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:46:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:46:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:46:54,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:46:54,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-20 11:46:56,937 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_mod_v_arrayElimCell_63_58 Int) (aux_div_v_arrayElimCell_63_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_63_58 4294967296))) (and (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_63_58)) (< aux_mod_v_arrayElimCell_63_58 4294967296) (<= 4294966496 aux_mod_v_arrayElimCell_63_58) (<= (+ .cse0 aux_mod_v_arrayElimCell_63_58 4294967297) 0) (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_63_58) 4294967295) 4294967296))))) is different from true [2022-11-20 11:46:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-20 11:46:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:00,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 11:47:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:47:01,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195407643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:01,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:01,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 52 [2022-11-20 11:47:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343947971] [2022-11-20 11:47:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:01,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:47:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:47:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2539, Unknown=2, NotChecked=102, Total=2862 [2022-11-20 11:47:01,503 INFO L87 Difference]: Start difference. First operand 10879 states and 22342 transitions. Second operand has 54 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:47:40,594 INFO L93 Difference]: Finished difference Result 12079 states and 23958 transitions. [2022-11-20 11:47:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 11:47:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-20 11:47:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:47:40,614 INFO L225 Difference]: With dead ends: 12079 [2022-11-20 11:47:40,614 INFO L226 Difference]: Without dead ends: 12079 [2022-11-20 11:47:40,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=1960, Invalid=15596, Unknown=4, NotChecked=262, Total=17822 [2022-11-20 11:47:40,615 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 557 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 3838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2116 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:47:40,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 5 Invalid, 3838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1693 Invalid, 0 Unknown, 2116 Unchecked, 3.1s Time] [2022-11-20 11:47:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12079 states. [2022-11-20 11:47:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12079 to 10913. [2022-11-20 11:47:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10913 states, 10906 states have (on average 2.05198973042362) internal successors, (22379), 10912 states have internal predecessors, (22379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10913 states to 10913 states and 22379 transitions. [2022-11-20 11:47:40,848 INFO L78 Accepts]: Start accepts. Automaton has 10913 states and 22379 transitions. Word has length 36 [2022-11-20 11:47:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:47:40,849 INFO L495 AbstractCegarLoop]: Abstraction has 10913 states and 22379 transitions. [2022-11-20 11:47:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 10913 states and 22379 transitions. [2022-11-20 11:47:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:47:40,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:47:40,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:40,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:47:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 11:47:41,063 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:47:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 898920798, now seen corresponding path program 1 times [2022-11-20 11:47:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277499330] [2022-11-20 11:47:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277499330] [2022-11-20 11:47:46,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277499330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096182609] [2022-11-20 11:47:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:46,245 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:46,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:47:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 11:47:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:46,716 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:47:46,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-20 11:47:47,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:47:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:47:48,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-20 11:47:49,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-11-20 11:47:50,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-20 11:47:52,927 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_70_58 Int) (aux_mod_v_arrayElimCell_70_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_70_58 4294967296))) (and (< aux_mod_v_arrayElimCell_70_58 4294967296) (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ (* 4294967295 aux_mod_v_arrayElimCell_70_58) 4294967295) 4294967296)) (<= 4294966496 aux_mod_v_arrayElimCell_70_58) (< 0 (+ 8589934593 .cse0 aux_mod_v_arrayElimCell_70_58)) (<= (+ .cse0 aux_mod_v_arrayElimCell_70_58 4294967297) 0)))) is different from true [2022-11-20 11:47:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:47:52,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:57,027 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-20 11:47:57,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-20 11:47:57,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:47:57,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-11-20 11:47:57,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 11:48:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096182609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:00,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 21] total 65 [2022-11-20 11:48:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439093072] [2022-11-20 11:48:00,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 11:48:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 11:48:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=3947, Unknown=19, NotChecked=128, Total=4422 [2022-11-20 11:48:00,003 INFO L87 Difference]: Start difference. First operand 10913 states and 22379 transitions. Second operand has 67 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:27,922 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 82 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:49:55,775 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~top~0 4)) (.cse2 (+ c_~top~0 1))) (let ((.cse0 (select |c_#memory_int| |c_~#arr~0.base|)) (.cse3 (= .cse2 0)) (.cse6 (= |c_t1Thread1of1ForFork0_push_~stack#1.base| |c_~#arr~0.base|)) (.cse7 (= |c_t1Thread1of1ForFork0_push_~stack#1.offset| |c_~#arr~0.offset|)) (.cse8 (not (= |c_ULTIMATE.start_main_~#id2~0#1.base| |c_~#arr~0.base|))) (.cse4 (= c_~top~0 0)) (.cse5 (+ |c_~#arr~0.offset| (- 4) .cse1))) (and (or (forall ((v_ArrVal_1560 Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_202| Int) (v_ArrVal_1561 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_110| Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store .cse0 (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_110|) v_ArrVal_1560)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse1)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_110| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| .cse2))) .cse3) (or .cse4 (forall ((v_ArrVal_1560 Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_202| Int) (v_ArrVal_1561 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_110| Int)) (or (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| c_~top~0) (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store .cse0 (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_110|) v_ArrVal_1560)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) .cse5) 4294967296))) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_110| |c_~#arr~0.offset|)))) (or .cse3 (and .cse6 .cse7 .cse8 (not (= 4294967294 (mod |c_t1Thread1of1ForFork0_push_~x#1| 4294967296))))) (or .cse3 (and .cse6 .cse7 .cse8 (not (= 4294967294 (mod |c_t1Thread1of1ForFork0_push_#in~x#1| 4294967296))))) (or .cse4 (forall ((v_ArrVal_1561 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) .cse5) 4294967296)))))))) is different from false [2022-11-20 11:49:57,667 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base|)) (.cse0 (= c_~top~0 0)) (.cse2 (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4)))) (and (or .cse0 (forall ((v_ArrVal_1560 Int) (|v_t1Thread1of1ForFork0_push_#t~ret34#1_202| Int) (v_ArrVal_1561 (Array Int Int))) (or (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork0_push_~stack#1.offset| (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| 4)) v_ArrVal_1560)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) .cse2) 4294967296))) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_202| c_~top~0)))) (or .cse0 (forall ((v_ArrVal_1560 Int) (v_ArrVal_1561 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork0_push_~stack#1.offset| (* |c_t1Thread1of1ForFork0_push_#t~ret34#1| 4)) v_ArrVal_1560)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) .cse2) 4294967296) 4294967294)))) (or .cse0 (forall ((v_ArrVal_1561 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1561) |c_~#arr~0.base|) .cse2) 4294967296))))))) is different from false [2022-11-20 11:50:41,410 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 57 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:16,384 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:52:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:38,250 INFO L93 Difference]: Finished difference Result 18781 states and 37523 transitions. [2022-11-20 11:52:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-11-20 11:52:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 11:52:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:38,286 INFO L225 Difference]: With dead ends: 18781 [2022-11-20 11:52:38,286 INFO L226 Difference]: Without dead ends: 18781 [2022-11-20 11:52:38,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 48 SyntacticMatches, 46 SemanticMatches, 275 ConstructedPredicates, 3 IntricatePredicates, 4 DeprecatedPredicates, 29928 ImplicationChecksByTransitivity, 279.5s TimeCoverageRelationStatistics Valid=6697, Invalid=67867, Unknown=250, NotChecked=1638, Total=76452 [2022-11-20 11:52:38,291 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1111 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4439 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 10356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5836 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:38,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 3 Invalid, 10356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 4439 Invalid, 0 Unknown, 5836 Unchecked, 12.2s Time] [2022-11-20 11:52:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2022-11-20 11:52:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 13935. [2022-11-20 11:52:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13935 states, 13928 states have (on average 2.093265364732912) internal successors, (29155), 13934 states have internal predecessors, (29155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13935 states to 13935 states and 29155 transitions. [2022-11-20 11:52:38,682 INFO L78 Accepts]: Start accepts. Automaton has 13935 states and 29155 transitions. Word has length 37 [2022-11-20 11:52:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:38,682 INFO L495 AbstractCegarLoop]: Abstraction has 13935 states and 29155 transitions. [2022-11-20 11:52:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13935 states and 29155 transitions. [2022-11-20 11:52:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:52:38,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:38,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:38,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:52:38,896 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 11:52:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash -308577840, now seen corresponding path program 2 times [2022-11-20 11:52:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:38,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020157919] [2022-11-20 11:52:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:44,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020157919] [2022-11-20 11:52:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020157919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:44,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847379840] [2022-11-20 11:52:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:52:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:44,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:44,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986d44ba-b923-473e-8922-017284618d72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:52:45,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:52:45,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 11:52:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:45,078 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:52:45,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:52:45,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-20 11:52:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:52:46,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-20 11:52:47,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 58 [2022-11-20 11:52:49,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-20 11:52:51,546 WARN L859 $PredicateComparison]: unable to prove that (exists ((aux_div_v_arrayElimCell_78_58 Int) (aux_mod_v_arrayElimCell_78_58 Int)) (let ((.cse0 (* aux_div_v_arrayElimCell_78_58 4294967296))) (and (<= (+ aux_mod_v_arrayElimCell_78_58 4294967297 .cse0) 0) (<= 4294966496 aux_mod_v_arrayElimCell_78_58) (= |c_t2Thread1of1ForFork1_#t~ret44#1| (mod (+ 4294967295 (* 4294967295 aux_mod_v_arrayElimCell_78_58)) 4294967296)) (< 0 (+ 8589934593 aux_mod_v_arrayElimCell_78_58 .cse0)) (< aux_mod_v_arrayElimCell_78_58 4294967296)))) is different from true [2022-11-20 11:52:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:52:51,570 INFO L328 TraceCheckSpWp]: Computing backward predicates...