./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:28:28,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:28:28,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:28:29,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:28:29,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:28:29,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:28:29,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:28:29,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:28:29,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:28:29,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:28:29,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:28:29,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:28:29,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:28:29,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:28:29,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:28:29,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:28:29,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:28:29,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:28:29,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:28:29,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:28:29,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:28:29,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:28:29,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:28:29,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:28:29,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:28:29,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:28:29,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:28:29,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:28:29,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:28:29,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:28:29,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:28:29,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:28:29,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:28:29,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:28:29,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:28:29,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:28:29,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:28:29,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:28:29,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:28:29,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:28:29,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:28:29,089 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 10:28:29,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:28:29,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:28:29,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:28:29,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:28:29,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:28:29,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:28:29,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:28:29,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:28:29,140 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:28:29,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:28:29,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:28:29,142 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:28:29,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:28:29,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:28:29,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:28:29,142 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:28:29,143 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:28:29,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 10:28:29,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:28:29,143 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:28:29,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:28:29,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:28:29,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:28:29,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:28:29,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:28:29,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:28:29,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:28:29,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:28:29,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:28:29,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:28:29,147 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_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-10-17 10:28:29,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:28:29,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:28:29,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:28:29,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:28:29,479 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:28:29,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-10-17 10:28:29,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/data/0a93d12ce/408059edc0b74914ba1e660ae87a1ceb/FLAG8e3e98f17 [2022-10-17 10:28:29,954 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:28:29,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-10-17 10:28:29,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/data/0a93d12ce/408059edc0b74914ba1e660ae87a1ceb/FLAG8e3e98f17 [2022-10-17 10:28:30,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/data/0a93d12ce/408059edc0b74914ba1e660ae87a1ceb [2022-10-17 10:28:30,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:28:30,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:28:30,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:28:30,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:28:30,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:28:30,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771e8b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30, skipping insertion in model container [2022-10-17 10:28:30,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:28:30,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:28:30,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:28:30,579 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:28:30,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:28:30,605 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:28:30,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30 WrapperNode [2022-10-17 10:28:30,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:28:30,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:28:30,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:28:30,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:28:30,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,638 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-10-17 10:28:30,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:28:30,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:28:30,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:28:30,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:28:30,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,663 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:28:30,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:28:30,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:28:30,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:28:30,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (1/1) ... [2022-10-17 10:28:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:28:30,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:30,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:28:30,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:28:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:28:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:28:30,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:28:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:28:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:28:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:28:30,823 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:28:30,826 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:28:31,018 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:28:31,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:28:31,024 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:28:31,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:28:31 BoogieIcfgContainer [2022-10-17 10:28:31,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:28:31,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:28:31,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:28:31,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:28:31,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:28:30" (1/3) ... [2022-10-17 10:28:31,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c3b74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:28:31, skipping insertion in model container [2022-10-17 10:28:31,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:28:30" (2/3) ... [2022-10-17 10:28:31,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c3b74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:28:31, skipping insertion in model container [2022-10-17 10:28:31,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:28:31" (3/3) ... [2022-10-17 10:28:31,041 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-10-17 10:28:31,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:28:31,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-17 10:28:31,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:28:31,193 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;@37336960, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:28:31,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-17 10:28:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 10:28:31,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:31,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 10:28:31,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-10-17 10:28:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702445999] [2022-10-17 10:28:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:31,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:31,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702445999] [2022-10-17 10:28:31,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702445999] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:31,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:31,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:28:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079602153] [2022-10-17 10:28:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:28:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:28:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:28:31,544 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) 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) [2022-10-17 10:28:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:31,595 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-10-17 10:28:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:28:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 [2022-10-17 10:28:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:31,606 INFO L225 Difference]: With dead ends: 59 [2022-10-17 10:28:31,607 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:28:31,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:28:31,612 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:31,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:28:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-10-17 10:28:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-10-17 10:28:31,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-10-17 10:28:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:31,649 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-10-17 10:28:31,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-10-17 10:28:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:28:31,650 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:31,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:28:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:28:31,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-10-17 10:28:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37364882] [2022-10-17 10:28:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:31,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37364882] [2022-10-17 10:28:31,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37364882] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:31,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:31,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:28:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006685271] [2022-10-17 10:28:31,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:31,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:28:31,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:28:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:28:31,752 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 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) [2022-10-17 10:28:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:31,808 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-10-17 10:28:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:28:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2022-10-17 10:28:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:31,811 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:28:31,814 INFO L226 Difference]: Without dead ends: 58 [2022-10-17 10:28:31,815 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 [2022-10-17 10:28:31,817 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:31,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-17 10:28:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-10-17 10:28:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-10-17 10:28:31,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-10-17 10:28:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:31,835 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-10-17 10:28:31,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-10-17 10:28:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-10-17 10:28:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:28:31,837 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:31,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:28:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:28:31,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-10-17 10:28:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373522416] [2022-10-17 10:28:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:31,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373522416] [2022-10-17 10:28:31,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373522416] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:31,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:31,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:28:31,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122131855] [2022-10-17 10:28:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:31,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:31,970 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:32,032 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-10-17 10:28:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:28:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:28:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:32,034 INFO L225 Difference]: With dead ends: 32 [2022-10-17 10:28:32,034 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 10:28:32,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:28:32,036 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:32,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 10:28:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-10-17 10:28:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-10-17 10:28:32,043 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-10-17 10:28:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:32,044 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-10-17 10:28:32,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-10-17 10:28:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:28:32,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:32,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:28:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:28:32,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-10-17 10:28:32,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:32,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610369508] [2022-10-17 10:28:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610369508] [2022-10-17 10:28:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610369508] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:32,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:32,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:28:32,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661106281] [2022-10-17 10:28:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:32,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:32,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:32,334 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:32,407 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-17 10:28:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:28:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:28:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:32,409 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:28:32,409 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:28:32,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:28:32,411 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:32,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:28:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-10-17 10:28:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-10-17 10:28:32,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-10-17 10:28:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:32,417 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-10-17 10:28:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-10-17 10:28:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 10:28:32,418 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:32,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:28:32,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-10-17 10:28:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278820527] [2022-10-17 10:28:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:32,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278820527] [2022-10-17 10:28:32,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278820527] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:32,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:32,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:28:32,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252953303] [2022-10-17 10:28:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:32,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:32,498 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:32,595 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-17 10:28:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:28:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-10-17 10:28:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:32,601 INFO L225 Difference]: With dead ends: 60 [2022-10-17 10:28:32,602 INFO L226 Difference]: Without dead ends: 60 [2022-10-17 10:28:32,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:28:32,607 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:32,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-17 10:28:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-10-17 10:28:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-10-17 10:28:32,621 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-10-17 10:28:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:32,621 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-10-17 10:28:32,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-10-17 10:28:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:28:32,623 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:32,626 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:32,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:28:32,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-10-17 10:28:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271778389] [2022-10-17 10:28:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:32,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271778389] [2022-10-17 10:28:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271778389] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116228055] [2022-10-17 10:28:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:32,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:32,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:32,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:28:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:28:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:32,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:32,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116228055] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:32,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:32,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-10-17 10:28:32,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324438616] [2022-10-17 10:28:32,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:32,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:28:32,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:28:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:28:32,881 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-10-17 10:28:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:32,971 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-10-17 10:28:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:28:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 10 [2022-10-17 10:28:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:32,974 INFO L225 Difference]: With dead ends: 130 [2022-10-17 10:28:32,975 INFO L226 Difference]: Without dead ends: 130 [2022-10-17 10:28:32,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:28:32,983 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:32,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-10-17 10:28:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-10-17 10:28:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-10-17 10:28:33,005 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-10-17 10:28:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:33,006 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-10-17 10:28:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-10-17 10:28:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-10-17 10:28:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:28:33,007 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:33,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:33,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:33,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:28:33,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-10-17 10:28:33,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:33,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902912441] [2022-10-17 10:28:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:33,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:33,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902912441] [2022-10-17 10:28:33,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902912441] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524802747] [2022-10-17 10:28:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:33,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:33,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:33,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:28:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:28:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:33,505 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:28:33,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:28:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:33,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524802747] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:33,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:33,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-10-17 10:28:33,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948727060] [2022-10-17 10:28:33,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:33,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:28:33,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:33,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:28:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:28:33,697 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:33,925 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-10-17 10:28:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:28:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:28:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:33,926 INFO L225 Difference]: With dead ends: 129 [2022-10-17 10:28:33,926 INFO L226 Difference]: Without dead ends: 129 [2022-10-17 10:28:33,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:28:33,928 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:33,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-10-17 10:28:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-10-17 10:28:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-10-17 10:28:33,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-10-17 10:28:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:33,934 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-10-17 10:28:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-10-17 10:28:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:28:33,935 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:33,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:33,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:34,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-10-17 10:28:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013554956] [2022-10-17 10:28:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013554956] [2022-10-17 10:28:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013554956] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051078382] [2022-10-17 10:28:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:34,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:34,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:28:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:34,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:28:34,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:34,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:34,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051078382] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:34,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:34,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:28:34,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369762554] [2022-10-17 10:28:34,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:28:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:28:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:28:34,420 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:34,583 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-10-17 10:28:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:28:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 10:28:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:34,584 INFO L225 Difference]: With dead ends: 88 [2022-10-17 10:28:34,584 INFO L226 Difference]: Without dead ends: 88 [2022-10-17 10:28:34,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:28:34,586 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:34,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-17 10:28:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-10-17 10:28:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-10-17 10:28:34,594 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-10-17 10:28:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:34,594 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-10-17 10:28:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-10-17 10:28:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:28:34,596 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:34,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:34,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:34,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-10-17 10:28:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132345752] [2022-10-17 10:28:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:28:34,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:34,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132345752] [2022-10-17 10:28:34,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132345752] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:34,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:34,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:28:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011232968] [2022-10-17 10:28:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:28:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:28:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:28:34,930 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:34,946 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-10-17 10:28:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:28:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 10:28:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:34,947 INFO L225 Difference]: With dead ends: 46 [2022-10-17 10:28:34,947 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 10:28:34,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:28:34,950 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:34,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 10:28:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-17 10:28:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-10-17 10:28:34,959 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-10-17 10:28:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:34,960 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-10-17 10:28:34,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-10-17 10:28:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:28:34,961 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:34,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:34,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:28:34,962 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:34,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-10-17 10:28:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:34,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038495982] [2022-10-17 10:28:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038495982] [2022-10-17 10:28:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038495982] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:35,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:35,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:28:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091054703] [2022-10-17 10:28:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:35,147 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:35,174 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-10-17 10:28:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:28:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 10:28:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:35,175 INFO L225 Difference]: With dead ends: 76 [2022-10-17 10:28:35,176 INFO L226 Difference]: Without dead ends: 76 [2022-10-17 10:28:35,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:28:35,176 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:35,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-17 10:28:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-10-17 10:28:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-10-17 10:28:35,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-10-17 10:28:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:35,198 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-10-17 10:28:35,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-10-17 10:28:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:28:35,200 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:35,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:35,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:28:35,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-10-17 10:28:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:35,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662840905] [2022-10-17 10:28:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:35,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662840905] [2022-10-17 10:28:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662840905] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010165115] [2022-10-17 10:28:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:35,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:35,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:35,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:28:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:28:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:35,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-10-17 10:28:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:35,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010165115] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:35,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:35,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-10-17 10:28:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579091149] [2022-10-17 10:28:35,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:35,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:28:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:28:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:28:35,651 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:35,736 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-10-17 10:28:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:28:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 10:28:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:35,738 INFO L225 Difference]: With dead ends: 80 [2022-10-17 10:28:35,738 INFO L226 Difference]: Without dead ends: 80 [2022-10-17 10:28:35,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:28:35,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:35,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-17 10:28:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-10-17 10:28:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-10-17 10:28:35,748 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-10-17 10:28:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:35,748 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-10-17 10:28:35,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-10-17 10:28:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:28:35,751 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:35,751 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-10-17 10:28:35,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:35,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:28:35,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:35,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-10-17 10:28:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120890441] [2022-10-17 10:28:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:28:36,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:36,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120890441] [2022-10-17 10:28:36,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120890441] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:36,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:28:36,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:28:36,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176871291] [2022-10-17 10:28:36,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:36,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:28:36,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:36,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:28:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:28:36,071 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-10-17 10:28:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:36,167 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-10-17 10:28:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:28:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 25 [2022-10-17 10:28:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:36,168 INFO L225 Difference]: With dead ends: 86 [2022-10-17 10:28:36,169 INFO L226 Difference]: Without dead ends: 86 [2022-10-17 10:28:36,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:28:36,170 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:36,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-17 10:28:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-10-17 10:28:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-10-17 10:28:36,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-10-17 10:28:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:36,181 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-10-17 10:28:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-10-17 10:28:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-10-17 10:28:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:28:36,186 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:36,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:28:36,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-10-17 10:28:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207646906] [2022-10-17 10:28:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207646906] [2022-10-17 10:28:36,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207646906] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064662742] [2022-10-17 10:28:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:36,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:36,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:28:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:28:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:28:36,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:28:36,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064662742] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:36,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:28:36,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-10-17 10:28:36,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369747258] [2022-10-17 10:28:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:28:36,686 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-10-17 10:28:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:36,687 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-10-17 10:28:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:28:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 26 [2022-10-17 10:28:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:36,688 INFO L225 Difference]: With dead ends: 62 [2022-10-17 10:28:36,689 INFO L226 Difference]: Without dead ends: 60 [2022-10-17 10:28:36,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:28:36,690 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:36,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-10-17 10:28:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-17 10:28:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-10-17 10:28:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-10-17 10:28:36,693 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-10-17 10:28:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:36,694 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-10-17 10:28:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-10-17 10:28:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-10-17 10:28:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:28:36,695 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:36,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:36,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:28:36,918 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-10-17 10:28:36,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445122532] [2022-10-17 10:28:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:36,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:28:37,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445122532] [2022-10-17 10:28:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445122532] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443161638] [2022-10-17 10:28:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:37,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:37,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:28:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:28:37,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:37,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-10-17 10:28:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:28:37,279 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:28:37,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 10 [2022-10-17 10:28:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:37,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:37,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 12 [2022-10-17 10:28:37,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-10-17 10:28:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:28:37,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443161638] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:37,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:37,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2022-10-17 10:28:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957560275] [2022-10-17 10:28:37,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:28:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:28:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:28:37,523 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:37,836 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-10-17 10:28:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:28:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 10:28:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:37,837 INFO L225 Difference]: With dead ends: 101 [2022-10-17 10:28:37,837 INFO L226 Difference]: Without dead ends: 101 [2022-10-17 10:28:37,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:28:37,839 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:28:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-10-17 10:28:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-10-17 10:28:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-10-17 10:28:37,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-10-17 10:28:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-10-17 10:28:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-10-17 10:28:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:28:37,843 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:37,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:37,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:38,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:28:38,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-10-17 10:28:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19253189] [2022-10-17 10:28:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19253189] [2022-10-17 10:28:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19253189] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472431489] [2022-10-17 10:28:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:38,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:38,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:28:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:28:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:38,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:28:38,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472431489] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:38,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-10-17 10:28:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569717611] [2022-10-17 10:28:38,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:28:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:28:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:28:38,459 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:38,634 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-10-17 10:28:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:28:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-10-17 10:28:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:38,635 INFO L225 Difference]: With dead ends: 66 [2022-10-17 10:28:38,636 INFO L226 Difference]: Without dead ends: 66 [2022-10-17 10:28:38,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:28:38,636 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:38,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-17 10:28:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-10-17 10:28:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-10-17 10:28:38,639 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-10-17 10:28:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:38,639 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-10-17 10:28:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-10-17 10:28:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 10:28:38,640 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:38,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:38,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:38,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-17 10:28:38,841 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:38,842 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-10-17 10:28:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311477406] [2022-10-17 10:28:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311477406] [2022-10-17 10:28:39,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311477406] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316655512] [2022-10-17 10:28:39,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:39,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:39,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:39,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:28:39,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:28:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:28:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:39,160 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:28:39,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:28:39,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 10:28:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:39,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:39,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316655512] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:39,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:39,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-10-17 10:28:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162191463] [2022-10-17 10:28:39,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:28:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:28:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:28:39,610 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:39,707 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-10-17 10:28:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:28:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 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 39 [2022-10-17 10:28:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:39,710 INFO L225 Difference]: With dead ends: 158 [2022-10-17 10:28:39,710 INFO L226 Difference]: Without dead ends: 158 [2022-10-17 10:28:39,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:28:39,711 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:39,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-17 10:28:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-10-17 10:28:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-10-17 10:28:39,717 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-10-17 10:28:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:39,718 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-10-17 10:28:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-10-17 10:28:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:28:39,721 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:39,721 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:39,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-17 10:28:39,938 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-10-17 10:28:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557715936] [2022-10-17 10:28:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:28:40,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557715936] [2022-10-17 10:28:40,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557715936] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57044235] [2022-10-17 10:28:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:40,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:40,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:40,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:28:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:28:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:28:40,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:28:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57044235] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:40,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:40,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-10-17 10:28:40,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37252701] [2022-10-17 10:28:40,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:40,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:28:40,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:28:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:28:40,409 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:40,652 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-10-17 10:28:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:28:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 42 [2022-10-17 10:28:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:40,654 INFO L225 Difference]: With dead ends: 165 [2022-10-17 10:28:40,654 INFO L226 Difference]: Without dead ends: 165 [2022-10-17 10:28:40,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:28:40,655 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:40,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 80 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-10-17 10:28:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-10-17 10:28:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-10-17 10:28:40,660 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-10-17 10:28:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:40,661 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-10-17 10:28:40,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-10-17 10:28:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-17 10:28:40,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:40,663 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:40,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:40,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-17 10:28:40,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-10-17 10:28:40,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:40,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490203067] [2022-10-17 10:28:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:40,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 10:28:41,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490203067] [2022-10-17 10:28:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490203067] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040037387] [2022-10-17 10:28:41,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:41,025 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:41,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:28:41,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:28:41,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:28:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:41,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:41,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-10-17 10:28:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:41,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040037387] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:41,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:41,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-10-17 10:28:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463517647] [2022-10-17 10:28:41,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:41,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:28:41,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:28:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:28:41,568 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2022-10-17 10:28:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:41,745 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2022-10-17 10:28:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:28:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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 49 [2022-10-17 10:28:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:41,747 INFO L225 Difference]: With dead ends: 153 [2022-10-17 10:28:41,747 INFO L226 Difference]: Without dead ends: 153 [2022-10-17 10:28:41,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:28:41,748 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 108 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-10-17 10:28:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2022-10-17 10:28:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-10-17 10:28:41,752 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2022-10-17 10:28:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:41,753 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-10-17 10:28:41,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2022-10-17 10:28:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-10-17 10:28:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-17 10:28:41,754 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:41,754 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-10-17 10:28:41,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:41,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:41,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-10-17 10:28:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866471749] [2022-10-17 10:28:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866471749] [2022-10-17 10:28:42,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866471749] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774915273] [2022-10-17 10:28:42,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:42,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:42,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:42,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:28:42,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:28:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:28:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:42,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:28:42,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774915273] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:42,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:42,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-10-17 10:28:42,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206856789] [2022-10-17 10:28:42,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:28:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:28:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:28:42,657 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:43,143 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2022-10-17 10:28:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:28:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-10-17 10:28:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:43,145 INFO L225 Difference]: With dead ends: 199 [2022-10-17 10:28:43,145 INFO L226 Difference]: Without dead ends: 199 [2022-10-17 10:28:43,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:28:43,146 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:43,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 105 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:28:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-17 10:28:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2022-10-17 10:28:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2022-10-17 10:28:43,151 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2022-10-17 10:28:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:43,151 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2022-10-17 10:28:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2022-10-17 10:28:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 10:28:43,153 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:43,153 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-17 10:28:43,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:43,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:43,366 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2022-10-17 10:28:43,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:43,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058607723] [2022-10-17 10:28:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:43,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:28:43,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:43,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058607723] [2022-10-17 10:28:43,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058607723] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:43,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002129042] [2022-10-17 10:28:43,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:28:43,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:43,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:43,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:43,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:28:43,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:28:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:28:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:28:43,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-17 10:28:43,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-17 10:28:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-17 10:28:44,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:28:44,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002129042] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:44,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:28:44,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2022-10-17 10:28:44,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728196208] [2022-10-17 10:28:44,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:44,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:28:44,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:28:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:28:44,024 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:44,067 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-10-17 10:28:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:28:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 75 [2022-10-17 10:28:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:44,069 INFO L225 Difference]: With dead ends: 143 [2022-10-17 10:28:44,069 INFO L226 Difference]: Without dead ends: 143 [2022-10-17 10:28:44,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:28:44,071 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:44,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:28:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-10-17 10:28:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2022-10-17 10:28:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-10-17 10:28:44,080 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2022-10-17 10:28:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:44,080 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-10-17 10:28:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-10-17 10:28:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:28:44,082 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:44,082 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:44,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:44,306 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2022-10-17 10:28:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520575117] [2022-10-17 10:28:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:28:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520575117] [2022-10-17 10:28:44,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520575117] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466639390] [2022-10-17 10:28:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:44,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:44,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 10:28:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:28:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:28:44,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:28:44,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466639390] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:44,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:44,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:28:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730675605] [2022-10-17 10:28:44,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:28:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:28:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:28:44,940 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:45,281 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-10-17 10:28:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:28:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 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 80 [2022-10-17 10:28:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:45,282 INFO L225 Difference]: With dead ends: 113 [2022-10-17 10:28:45,282 INFO L226 Difference]: Without dead ends: 113 [2022-10-17 10:28:45,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:28:45,283 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:45,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 100 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:28:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-17 10:28:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-10-17 10:28:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-10-17 10:28:45,287 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2022-10-17 10:28:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:45,287 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-10-17 10:28:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-10-17 10:28:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-10-17 10:28:45,288 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:45,288 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:28:45,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:45,489 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2022-10-17 10:28:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695969601] [2022-10-17 10:28:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-10-17 10:28:45,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695969601] [2022-10-17 10:28:45,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695969601] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173739070] [2022-10-17 10:28:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:45,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:45,674 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 10:28:45,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:28:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:28:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-10-17 10:28:46,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:28:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173739070] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:28:46,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:28:46,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-10-17 10:28:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537472880] [2022-10-17 10:28:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:28:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:28:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:28:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:28:46,338 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:46,340 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-10-17 10:28:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:28:46,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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 85 [2022-10-17 10:28:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:46,341 INFO L225 Difference]: With dead ends: 110 [2022-10-17 10:28:46,341 INFO L226 Difference]: Without dead ends: 94 [2022-10-17 10:28:46,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:28:46,343 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:46,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-10-17 10:28:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-17 10:28:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-10-17 10:28:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-10-17 10:28:46,348 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2022-10-17 10:28:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:46,348 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-10-17 10:28:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-10-17 10:28:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 10:28:46,351 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:46,351 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-10-17 10:28:46,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:46,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-10-17 10:28:46,578 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-10-17 10:28:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:46,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371878873] [2022-10-17 10:28:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:46,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-17 10:28:46,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371878873] [2022-10-17 10:28:46,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371878873] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066160868] [2022-10-17 10:28:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:28:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:46,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-17 10:28:46,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:28:46,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:28:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:46,918 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:28:46,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:28:47,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:28:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-10-17 10:28:47,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-10-17 10:28:47,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066160868] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:47,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:47,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-10-17 10:28:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446548714] [2022-10-17 10:28:47,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:47,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:28:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:28:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:28:47,485 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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) [2022-10-17 10:28:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:47,772 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-10-17 10:28:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:28:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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 91 [2022-10-17 10:28:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:47,774 INFO L225 Difference]: With dead ends: 117 [2022-10-17 10:28:47,774 INFO L226 Difference]: Without dead ends: 117 [2022-10-17 10:28:47,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:28:47,775 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:47,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 64 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:28:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-10-17 10:28:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2022-10-17 10:28:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-10-17 10:28:47,779 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-10-17 10:28:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:47,779 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-10-17 10:28:47,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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) [2022-10-17 10:28:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-10-17 10:28:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 10:28:47,781 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:47,781 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-10-17 10:28:47,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:47,991 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-10-17 10:28:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:47,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972266765] [2022-10-17 10:28:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-17 10:28:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972266765] [2022-10-17 10:28:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972266765] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174005562] [2022-10-17 10:28:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:48,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:48,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 10:28:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-17 10:28:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:48,604 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:28:48,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:28:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-17 10:28:48,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-10-17 10:28:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174005562] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:49,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:49,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-10-17 10:28:49,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807762401] [2022-10-17 10:28:49,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:28:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:28:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:28:49,397 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:49,851 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-10-17 10:28:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:28:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 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 92 [2022-10-17 10:28:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:49,853 INFO L225 Difference]: With dead ends: 159 [2022-10-17 10:28:49,853 INFO L226 Difference]: Without dead ends: 159 [2022-10-17 10:28:49,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-10-17 10:28:49,854 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:49,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 88 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:28:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-10-17 10:28:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2022-10-17 10:28:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-10-17 10:28:49,858 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2022-10-17 10:28:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:49,858 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-10-17 10:28:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-10-17 10:28:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-10-17 10:28:49,859 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:49,860 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-10-17 10:28:49,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:50,070 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2022-10-17 10:28:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:50,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319201826] [2022-10-17 10:28:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:50,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-10-17 10:28:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:50,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319201826] [2022-10-17 10:28:50,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319201826] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:50,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103792482] [2022-10-17 10:28:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:28:50,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:50,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-17 10:28:50,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:28:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:28:50,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-10-17 10:28:51,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:51,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-10-17 10:28:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-10-17 10:28:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103792482] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:52,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-10-17 10:28:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119645279] [2022-10-17 10:28:52,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-10-17 10:28:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-10-17 10:28:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-10-17 10:28:52,550 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:54,033 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2022-10-17 10:28:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-10-17 10:28:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 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 122 [2022-10-17 10:28:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:54,035 INFO L225 Difference]: With dead ends: 167 [2022-10-17 10:28:54,035 INFO L226 Difference]: Without dead ends: 167 [2022-10-17 10:28:54,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2022-10-17 10:28:54,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:54,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 122 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:28:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-10-17 10:28:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-10-17 10:28:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-10-17 10:28:54,050 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2022-10-17 10:28:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:54,050 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-10-17 10:28:54,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-10-17 10:28:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-10-17 10:28:54,054 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:54,055 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-17 10:28:54,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:54,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-10-17 10:28:54,282 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2022-10-17 10:28:54,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:54,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905767092] [2022-10-17 10:28:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:54,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 865 proven. 297 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-10-17 10:28:54,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905767092] [2022-10-17 10:28:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905767092] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959795387] [2022-10-17 10:28:54,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:28:54,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:54,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:54,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-17 10:28:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-17 10:28:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:28:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-10-17 10:28:55,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-10-17 10:28:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959795387] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:55,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:55,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2022-10-17 10:28:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092258966] [2022-10-17 10:28:55,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-17 10:28:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-17 10:28:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 10:28:55,621 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:56,660 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2022-10-17 10:28:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-17 10:28:56,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-10-17 10:28:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:56,662 INFO L225 Difference]: With dead ends: 161 [2022-10-17 10:28:56,662 INFO L226 Difference]: Without dead ends: 161 [2022-10-17 10:28:56,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=832, Invalid=3328, Unknown=0, NotChecked=0, Total=4160 [2022-10-17 10:28:56,664 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 418 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:56,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 89 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:28:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-10-17 10:28:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2022-10-17 10:28:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2022-10-17 10:28:56,675 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2022-10-17 10:28:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2022-10-17 10:28:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2022-10-17 10:28:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-10-17 10:28:56,683 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:56,683 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-17 10:28:56,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-17 10:28:56,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-10-17 10:28:56,901 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:28:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:28:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2022-10-17 10:28:56,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:28:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253624706] [2022-10-17 10:28:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:28:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:28:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:28:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-10-17 10:28:57,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:28:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253624706] [2022-10-17 10:28:57,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253624706] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:28:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947319574] [2022-10-17 10:28:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:28:57,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:28:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:28:57,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:28:57,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-17 10:28:57,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:28:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:28:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:28:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:28:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-10-17 10:28:58,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:28:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-10-17 10:28:58,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947319574] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:28:58,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:28:58,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2022-10-17 10:28:58,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970513861] [2022-10-17 10:28:58,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:28:58,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-17 10:28:58,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:28:58,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-17 10:28:58,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:28:58,428 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:28:59,829 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2022-10-17 10:28:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-10-17 10:28:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-10-17 10:28:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:28:59,832 INFO L225 Difference]: With dead ends: 401 [2022-10-17 10:28:59,832 INFO L226 Difference]: Without dead ends: 401 [2022-10-17 10:28:59,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 280 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4517 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2022-10-17 10:28:59,837 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 275 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:28:59,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 98 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:28:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-10-17 10:28:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-10-17 10:28:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2022-10-17 10:28:59,846 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2022-10-17 10:28:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:28:59,847 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2022-10-17 10:28:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:28:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2022-10-17 10:28:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-10-17 10:28:59,852 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:28:59,852 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-10-17 10:28:59,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-10-17 10:29:00,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdd9dad0-938f-4ce8-8787-431948321ef6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:29:00,074 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-17 10:29:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2022-10-17 10:29:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:00,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786579557] [2022-10-17 10:29:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat