./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0942d3c46657b9d8ac8f8537aec24fbcc2f0b19e897472dc297ad201df07c1bb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:30:25,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:30:25,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:30:25,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:30:25,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:30:25,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:30:25,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:30:25,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:30:25,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:30:25,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:30:25,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:30:25,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:30:25,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:30:25,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:30:25,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:30:25,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:30:25,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:30:25,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:30:25,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:30:25,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:30:25,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:30:25,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:30:25,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:30:25,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:30:25,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:30:25,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:30:25,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:30:25,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:30:25,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:30:25,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:30:25,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:30:25,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:30:25,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:30:25,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:30:25,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:30:25,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:30:25,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:30:25,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:30:25,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:30:25,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:30:25,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:30:25,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-20 09:30:25,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:30:25,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:30:25,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:30:25,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:30:25,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:30:25,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:30:25,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:30:25,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:30:25,316 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:30:25,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:30:25,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:30:25,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:30:25,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:30:25,319 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:30:25,319 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:30:25,319 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:30:25,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:30:25,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:30:25,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:30:25,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:30:25,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:30:25,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:30:25,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:30:25,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:30:25,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:30:25,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:30:25,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:30:25,322 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_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0942d3c46657b9d8ac8f8537aec24fbcc2f0b19e897472dc297ad201df07c1bb [2022-11-20 09:30:25,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:30:25,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:30:25,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:30:25,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:30:25,650 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:30:25,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i [2022-11-20 09:30:28,996 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:30:29,344 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:30:29,344 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/sv-benchmarks/c/termination-15/cstrspn_diffterm_alloca.i [2022-11-20 09:30:29,355 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/data/4ed7977a0/f447ad29551c44d7804690cd0ab604f3/FLAGce54b0f08 [2022-11-20 09:30:29,372 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/data/4ed7977a0/f447ad29551c44d7804690cd0ab604f3 [2022-11-20 09:30:29,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:30:29,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:30:29,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:29,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:30:29,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:30:29,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645ccba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29, skipping insertion in model container [2022-11-20 09:30:29,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:30:29,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:30:29,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:29,737 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:30:29,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:29,818 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:30:29,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29 WrapperNode [2022-11-20 09:30:29,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:29,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:30:29,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:30:29,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:30:29,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,871 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-20 09:30:29,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:30:29,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:30:29,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:30:29,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:30:29,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:30:29,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:30:29,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:30:29,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:30:29,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (1/1) ... [2022-11-20 09:30:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:30:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:29,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:30:29,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:30:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:30:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:30:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:30:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:30:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:30:30,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:30:30,129 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:30:30,132 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:30:30,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:30:30,443 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:30:30,444 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:30:30,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:30:30 BoogieIcfgContainer [2022-11-20 09:30:30,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:30:30,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:30:30,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:30:30,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:30:30,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:30:29" (1/3) ... [2022-11-20 09:30:30,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe4cd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:30:30, skipping insertion in model container [2022-11-20 09:30:30,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:29" (2/3) ... [2022-11-20 09:30:30,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe4cd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:30:30, skipping insertion in model container [2022-11-20 09:30:30,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:30:30" (3/3) ... [2022-11-20 09:30:30,457 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn_diffterm_alloca.i [2022-11-20 09:30:30,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:30:30,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-20 09:30:30,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:30:30,540 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;@2d9efe45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:30:30,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-20 09:30:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:30,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:30,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:30,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-11-20 09:30:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:30,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631101394] [2022-11-20 09:30:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:30,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:31,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:31,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631101394] [2022-11-20 09:30:31,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631101394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:31,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:31,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312291045] [2022-11-20 09:30:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:31,193 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:31,316 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-20 09:30:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 09:30:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:31,338 INFO L225 Difference]: With dead ends: 40 [2022-11-20 09:30:31,346 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 09:30:31,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:31,356 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:31,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 09:30:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-20 09:30:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-20 09:30:31,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2022-11-20 09:30:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:31,418 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-20 09:30:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-20 09:30:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:31,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:31,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:30:31,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-11-20 09:30:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:31,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058099303] [2022-11-20 09:30:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:31,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:31,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058099303] [2022-11-20 09:30:31,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058099303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:31,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:31,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740483100] [2022-11-20 09:30:31,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:31,735 INFO L87 Difference]: Start difference. First operand 38 states and 43 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) [2022-11-20 09:30:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:31,831 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-20 09:30:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:31,832 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 [2022-11-20 09:30:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:31,833 INFO L225 Difference]: With dead ends: 72 [2022-11-20 09:30:31,833 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 09:30:31,834 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 [2022-11-20 09:30:31,836 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:31,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 09:30:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2022-11-20 09:30:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-20 09:30:31,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 6 [2022-11-20 09:30:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:31,844 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-20 09:30:31,845 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) [2022-11-20 09:30:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-20 09:30:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:31,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:31,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:31,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:30:31,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-11-20 09:30:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545594583] [2022-11-20 09:30:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545594583] [2022-11-20 09:30:32,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545594583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:32,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:32,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:30:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638331470] [2022-11-20 09:30:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:32,082 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:32,129 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-20 09:30:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:30:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 09:30:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,131 INFO L225 Difference]: With dead ends: 40 [2022-11-20 09:30:32,131 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 09:30:32,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:32,133 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 09:30:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-20 09:30:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.75) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-20 09:30:32,139 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 6 [2022-11-20 09:30:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:32,140 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-20 09:30:32,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-20 09:30:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:30:32,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:32,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:32,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:30:32,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2022-11-20 09:30:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:32,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212045075] [2022-11-20 09:30:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:32,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212045075] [2022-11-20 09:30:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212045075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:32,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:32,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081767405] [2022-11-20 09:30:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:32,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:32,216 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-20 09:30:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:32,287 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-20 09:30:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2022-11-20 09:30:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,289 INFO L225 Difference]: With dead ends: 36 [2022-11-20 09:30:32,290 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 09:30:32,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:32,291 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 09:30:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 09:30:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-20 09:30:32,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 7 [2022-11-20 09:30:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:32,298 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-20 09:30:32,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-20 09:30:32,298 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-20 09:30:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:30:32,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:32,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:32,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:30:32,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2022-11-20 09:30:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193494220] [2022-11-20 09:30:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:32,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:32,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193494220] [2022-11-20 09:30:32,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193494220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:32,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:32,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759927264] [2022-11-20 09:30:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:32,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:32,542 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 09:30:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:32,689 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-20 09:30:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-20 09:30:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,691 INFO L225 Difference]: With dead ends: 67 [2022-11-20 09:30:32,691 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 09:30:32,693 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 [2022-11-20 09:30:32,694 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 09:30:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-11-20 09:30:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-20 09:30:32,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 7 [2022-11-20 09:30:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:32,706 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-20 09:30:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 09:30:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-20 09:30:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:30:32,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:32,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:32,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:30:32,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088457, now seen corresponding path program 1 times [2022-11-20 09:30:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011003262] [2022-11-20 09:30:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:32,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011003262] [2022-11-20 09:30:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011003262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:32,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:32,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:30:32,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567825846] [2022-11-20 09:30:32,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:32,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:32,851 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2022-11-20 09:30:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:32,893 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-20 09:30:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:30:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 [2022-11-20 09:30:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,894 INFO L225 Difference]: With dead ends: 38 [2022-11-20 09:30:32,894 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 09:30:32,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:32,903 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 09:30:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-20 09:30:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-20 09:30:32,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2022-11-20 09:30:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:32,907 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-20 09:30:32,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2022-11-20 09:30:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-20 09:30:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:30:32,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:32,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:32,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:30:32,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash -534039922, now seen corresponding path program 1 times [2022-11-20 09:30:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033833382] [2022-11-20 09:30:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:32,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033833382] [2022-11-20 09:30:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033833382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:32,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:32,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964554451] [2022-11-20 09:30:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:32,967 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:33,021 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-20 09:30:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:30:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:33,023 INFO L225 Difference]: With dead ends: 33 [2022-11-20 09:30:33,023 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 09:30:33,023 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 [2022-11-20 09:30:33,024 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:33,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 09:30:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 09:30:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 32 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) [2022-11-20 09:30:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-20 09:30:33,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2022-11-20 09:30:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:33,029 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-20 09:30:33,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-20 09:30:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:30:33,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:33,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:33,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:30:33,033 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash -534039921, now seen corresponding path program 1 times [2022-11-20 09:30:33,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:33,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708031117] [2022-11-20 09:30:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:33,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708031117] [2022-11-20 09:30:33,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708031117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:33,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:30:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826217046] [2022-11-20 09:30:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:33,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:30:33,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:30:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:30:33,194 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:33,291 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-20 09:30:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:30:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:30:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:33,295 INFO L225 Difference]: With dead ends: 56 [2022-11-20 09:30:33,296 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 09:30:33,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:30:33,298 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:33,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 51 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 09:30:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 36. [2022-11-20 09:30:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-20 09:30:33,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 9 [2022-11-20 09:30:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:33,306 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-20 09:30:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-20 09:30:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:30:33,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:33,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:30:33,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144940, now seen corresponding path program 1 times [2022-11-20 09:30:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659432887] [2022-11-20 09:30:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:33,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:33,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659432887] [2022-11-20 09:30:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659432887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:33,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:33,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:30:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567463254] [2022-11-20 09:30:33,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:33,419 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:33,493 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-20 09:30:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:30:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:30:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:33,495 INFO L225 Difference]: With dead ends: 35 [2022-11-20 09:30:33,495 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 09:30:33,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:33,498 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:33,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 37 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 09:30:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-20 09:30:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-20 09:30:33,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2022-11-20 09:30:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:33,509 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-20 09:30:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-20 09:30:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:30:33,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:33,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:30:33,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144939, now seen corresponding path program 1 times [2022-11-20 09:30:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:33,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632048661] [2022-11-20 09:30:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632048661] [2022-11-20 09:30:33,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632048661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:33,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:33,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:30:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884809424] [2022-11-20 09:30:33,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:33,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:30:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:30:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:33,757 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:33,877 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-11-20 09:30:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:30:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:30:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:33,879 INFO L225 Difference]: With dead ends: 49 [2022-11-20 09:30:33,879 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 09:30:33,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:33,880 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 176 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:33,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 56 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 09:30:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-11-20 09:30:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-20 09:30:33,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 13 [2022-11-20 09:30:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-20 09:30:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-20 09:30:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:30:33,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:33,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:33,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 09:30:33,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1693161859, now seen corresponding path program 1 times [2022-11-20 09:30:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440472254] [2022-11-20 09:30:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:34,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:34,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440472254] [2022-11-20 09:30:34,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440472254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:34,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:34,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:30:34,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181733063] [2022-11-20 09:30:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:34,110 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:34,145 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-20 09:30:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:30:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:34,152 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:30:34,152 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 09:30:34,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:34,154 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:34,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 09:30:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 09:30:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-20 09:30:34,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 13 [2022-11-20 09:30:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-20 09:30:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-20 09:30:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 09:30:34,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:34,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:34,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:30:34,170 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 950889964, now seen corresponding path program 1 times [2022-11-20 09:30:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592480715] [2022-11-20 09:30:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:34,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592480715] [2022-11-20 09:30:34,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592480715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:34,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:34,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:34,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339818227] [2022-11-20 09:30:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:34,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:34,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:34,208 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:34,219 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-20 09:30:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 09:30:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:34,220 INFO L225 Difference]: With dead ends: 38 [2022-11-20 09:30:34,220 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 09:30:34,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:34,222 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:34,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 09:30:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-20 09:30:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-20 09:30:34,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 17 [2022-11-20 09:30:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-20 09:30:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-20 09:30:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:30:34,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:34,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:30:34,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1028637879, now seen corresponding path program 1 times [2022-11-20 09:30:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:34,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223801994] [2022-11-20 09:30:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223801994] [2022-11-20 09:30:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223801994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:34,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:30:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040652100] [2022-11-20 09:30:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:30:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:34,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:30:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:34,483 INFO L87 Difference]: Start difference. First operand 38 states and 44 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) [2022-11-20 09:30:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:34,619 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-11-20 09:30:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:30:34,620 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 19 [2022-11-20 09:30:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:34,620 INFO L225 Difference]: With dead ends: 45 [2022-11-20 09:30:34,620 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 09:30:34,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:34,621 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:34,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:30:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 09:30:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-20 09:30:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-20 09:30:34,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 19 [2022-11-20 09:30:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:34,625 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-20 09:30:34,625 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) [2022-11-20 09:30:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-20 09:30:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:30:34,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:34,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:34,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 09:30:34,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:34,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1677981515, now seen corresponding path program 1 times [2022-11-20 09:30:34,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:34,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140331662] [2022-11-20 09:30:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:34,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:34,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140331662] [2022-11-20 09:30:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140331662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:34,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:34,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 09:30:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839197967] [2022-11-20 09:30:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:30:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:30:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:30:34,864 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:35,039 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-11-20 09:30:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:30:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 09:30:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:35,041 INFO L225 Difference]: With dead ends: 58 [2022-11-20 09:30:35,041 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 09:30:35,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:30:35,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:35,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 146 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 09:30:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-20 09:30:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-20 09:30:35,045 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2022-11-20 09:30:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:35,045 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-20 09:30:35,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-20 09:30:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:30:35,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:35,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:35,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 09:30:35,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash 656913161, now seen corresponding path program 1 times [2022-11-20 09:30:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:35,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538661933] [2022-11-20 09:30:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538661933] [2022-11-20 09:30:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538661933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:35,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839125860] [2022-11-20 09:30:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:35,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:35,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:30:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:30:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:35,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:30:36,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:36,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 09:30:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:36,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:36,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-20 09:30:36,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:30:36,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 09:30:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839125860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:36,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:36,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-11-20 09:30:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558222547] [2022-11-20 09:30:36,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:36,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:30:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:30:36,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:30:36,897 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:37,469 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-11-20 09:30:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:30:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 09:30:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:37,471 INFO L225 Difference]: With dead ends: 86 [2022-11-20 09:30:37,471 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 09:30:37,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:30:37,472 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:37,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 219 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-11-20 09:30:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 09:30:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2022-11-20 09:30:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-20 09:30:37,475 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 19 [2022-11-20 09:30:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:37,475 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-20 09:30:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-20 09:30:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 09:30:37,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:37,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:37,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:30:37,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 658274998, now seen corresponding path program 1 times [2022-11-20 09:30:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251205657] [2022-11-20 09:30:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251205657] [2022-11-20 09:30:37,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251205657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:37,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:37,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 09:30:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878204959] [2022-11-20 09:30:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:37,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:37,828 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:38,022 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-11-20 09:30:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:30:38,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 09:30:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:38,024 INFO L225 Difference]: With dead ends: 52 [2022-11-20 09:30:38,024 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 09:30:38,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:30:38,025 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:38,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 77 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 09:30:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-20 09:30:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 34 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) [2022-11-20 09:30:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-20 09:30:38,029 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 20 [2022-11-20 09:30:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:38,029 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-20 09:30:38,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-20 09:30:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:30:38,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:38,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:38,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 09:30:38,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2067169221, now seen corresponding path program 1 times [2022-11-20 09:30:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974723342] [2022-11-20 09:30:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:38,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974723342] [2022-11-20 09:30:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974723342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224660341] [2022-11-20 09:30:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:38,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:38,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:38,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:30:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:38,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:30:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:38,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:30:38,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:30:38,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:30:38,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:38,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 09:30:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:38,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:39,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:39,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-20 09:30:39,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:39,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-20 09:30:39,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 09:30:39,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:30:39,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:30:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:39,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224660341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:39,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:39,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-11-20 09:30:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775772711] [2022-11-20 09:30:39,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:39,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:30:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:30:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:30:39,373 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:39,626 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-11-20 09:30:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:30:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 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 22 [2022-11-20 09:30:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:39,628 INFO L225 Difference]: With dead ends: 60 [2022-11-20 09:30:39,628 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 09:30:39,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:30:39,629 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:39,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 181 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 09:30:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 09:30:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2022-11-20 09:30:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-20 09:30:39,634 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2022-11-20 09:30:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:39,634 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-20 09:30:39,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-20 09:30:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:30:39,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:39,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:39,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:30:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 09:30:39,842 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1423532355, now seen corresponding path program 2 times [2022-11-20 09:30:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:39,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121749516] [2022-11-20 09:30:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:40,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121749516] [2022-11-20 09:30:40,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121749516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230491506] [2022-11-20 09:30:40,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:40,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:40,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:40,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:40,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:30:40,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:30:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:40,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:30:41,443 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 09:30:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-20 09:30:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:41,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:42,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-20 09:30:42,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-20 09:30:42,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 09:30:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:42,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230491506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:42,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:42,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-11-20 09:30:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347043117] [2022-11-20 09:30:42,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 09:30:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 09:30:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:30:42,567 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:43,694 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-20 09:30:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:30:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 09:30:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:43,696 INFO L225 Difference]: With dead ends: 48 [2022-11-20 09:30:43,696 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 09:30:43,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 09:30:43,697 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:43,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 193 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 09:30:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 09:30:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-20 09:30:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-20 09:30:43,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 25 [2022-11-20 09:30:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:43,700 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-20 09:30:43,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-20 09:30:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 09:30:43,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:43,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:43,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:43,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:30:43,902 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1925553675, now seen corresponding path program 1 times [2022-11-20 09:30:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:43,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869699] [2022-11-20 09:30:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869699] [2022-11-20 09:30:44,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252478806] [2022-11-20 09:30:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:44,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:44,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:30:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:30:44,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:44,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:30:45,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:45,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 09:30:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:45,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:45,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-20 09:30:45,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 09:30:45,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 09:30:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:45,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252478806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:45,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:45,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-11-20 09:30:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599143511] [2022-11-20 09:30:45,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:45,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 09:30:45,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 09:30:45,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:30:45,954 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 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) [2022-11-20 09:30:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:47,093 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-11-20 09:30:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:30:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 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) Word has length 32 [2022-11-20 09:30:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:47,095 INFO L225 Difference]: With dead ends: 84 [2022-11-20 09:30:47,095 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 09:30:47,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 09:30:47,096 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:47,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 197 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-11-20 09:30:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 09:30:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2022-11-20 09:30:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.11864406779661) 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) [2022-11-20 09:30:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-20 09:30:47,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 32 [2022-11-20 09:30:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:47,099 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-20 09:30:47,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 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) [2022-11-20 09:30:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-20 09:30:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 09:30:47,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:47,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:47,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:47,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:47,301 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash -587507249, now seen corresponding path program 2 times [2022-11-20 09:30:47,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:47,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658610000] [2022-11-20 09:30:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658610000] [2022-11-20 09:30:48,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658610000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641099862] [2022-11-20 09:30:48,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:48,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:48,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:48,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:48,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:30:48,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:48,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 09:30:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:48,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:30:48,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:30:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:30:50,377 INFO L321 Elim1Store]: treesize reduction 21, result has 67.7 percent of original size [2022-11-20 09:30:50,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 57 [2022-11-20 09:30:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:50,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:52,143 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23| Int) (v_ArrVal_225 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_225))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse0 (select (select .cse2 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (<= (+ 3 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= 49 .cse0) (= 49 (select .cse1 (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23| 1))) (not (<= 0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23|) (not (= (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_23|) .cse0)))))) is different from false [2022-11-20 09:30:52,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:52,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 52 [2022-11-20 09:30:52,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:52,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 158 [2022-11-20 09:30:52,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:30:52,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 79 [2022-11-20 09:30:52,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:30:53,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:30:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641099862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:53,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:53,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 09:30:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753124964] [2022-11-20 09:30:53,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 09:30:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 09:30:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2329, Unknown=1, NotChecked=98, Total=2652 [2022-11-20 09:30:53,073 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 52 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 52 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:56,290 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-11-20 09:30:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:30:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 52 states have internal predecessors, (98), 0 states have call successors, (0), 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 35 [2022-11-20 09:30:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:56,291 INFO L225 Difference]: With dead ends: 73 [2022-11-20 09:30:56,291 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 09:30:56,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=821, Invalid=6154, Unknown=1, NotChecked=164, Total=7140 [2022-11-20 09:30:56,295 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:56,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 183 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 09:30:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 09:30:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-11-20 09:30:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-20 09:30:56,298 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 35 [2022-11-20 09:30:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:56,299 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-20 09:30:56,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 52 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-20 09:30:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 09:30:56,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:56,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:56,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:56,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:56,506 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:30:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -63083351, now seen corresponding path program 2 times [2022-11-20 09:30:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:56,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33218992] [2022-11-20 09:30:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:57,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33218992] [2022-11-20 09:30:57,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33218992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723129583] [2022-11-20 09:30:57,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:57,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:57,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:57,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:57,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:30:57,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 09:30:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:57,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:30:58,746 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-11-20 09:30:58,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 09:30:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:58,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:00,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-20 09:31:00,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-11-20 09:31:00,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:31:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:00,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723129583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:00,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:00,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 20] total 47 [2022-11-20 09:31:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034145222] [2022-11-20 09:31:00,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:00,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 09:31:00,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 09:31:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2007, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 09:31:00,357 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:02,950 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-11-20 09:31:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:31:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 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 38 [2022-11-20 09:31:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:02,951 INFO L225 Difference]: With dead ends: 101 [2022-11-20 09:31:02,952 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 09:31:02,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 09:31:02,953 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:02,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 358 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 352 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-11-20 09:31:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 09:31:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-11-20 09:31:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-20 09:31:02,956 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 38 [2022-11-20 09:31:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:02,957 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-20 09:31:02,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-20 09:31:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 09:31:02,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:02,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:02,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:03,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 09:31:03,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1577261761, now seen corresponding path program 3 times [2022-11-20 09:31:03,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:03,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736441528] [2022-11-20 09:31:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736441528] [2022-11-20 09:31:03,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736441528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090045047] [2022-11-20 09:31:03,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:03,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:03,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:31:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:31:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:31:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:03,634 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:31:03,636 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 09:31:03,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:31:04,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:04,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 09:31:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:31:04,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:04,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-20 09:31:04,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 09:31:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:31:04,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090045047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:04,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:04,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 25 [2022-11-20 09:31:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971114537] [2022-11-20 09:31:04,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:04,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 09:31:04,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 09:31:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:31:04,966 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 26 states, 25 states have (on average 3.76) internal successors, (94), 26 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) [2022-11-20 09:31:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:05,789 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-11-20 09:31:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:31:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.76) internal successors, (94), 26 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) Word has length 38 [2022-11-20 09:31:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:05,790 INFO L225 Difference]: With dead ends: 101 [2022-11-20 09:31:05,790 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 09:31:05,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 09:31:05,791 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:05,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 160 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-11-20 09:31:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 09:31:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-11-20 09:31:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-20 09:31:05,795 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 38 [2022-11-20 09:31:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:05,796 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-20 09:31:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.76) internal successors, (94), 26 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) [2022-11-20 09:31:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-20 09:31:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 09:31:05,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:05,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:05,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:06,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 09:31:06,004 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1878385307, now seen corresponding path program 1 times [2022-11-20 09:31:06,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687038579] [2022-11-20 09:31:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:06,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687038579] [2022-11-20 09:31:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687038579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143768724] [2022-11-20 09:31:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:06,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:06,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:06,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:06,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:31:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 09:31:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:06,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:31:06,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:31:07,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:31:08,369 INFO L321 Elim1Store]: treesize reduction 7, result has 89.2 percent of original size [2022-11-20 09:31:08,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 75 [2022-11-20 09:31:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:08,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:09,724 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32| Int) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_290))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select (select .cse2 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32| 1)) .cse1)) (= 49 (select .cse0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32|)) (<= (+ 3 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32|)) (= 49 .cse1) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_32|))))) is different from false [2022-11-20 09:31:09,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:09,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 52 [2022-11-20 09:31:09,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:09,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 132 treesize of output 160 [2022-11-20 09:31:09,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:09,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 79 [2022-11-20 09:31:09,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:31:10,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:31:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143768724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:10,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:10,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 38 [2022-11-20 09:31:10,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983795787] [2022-11-20 09:31:10,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 09:31:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 09:31:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1232, Unknown=1, NotChecked=72, Total=1482 [2022-11-20 09:31:10,293 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:11,668 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-20 09:31:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 09:31:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 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 41 [2022-11-20 09:31:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:11,669 INFO L225 Difference]: With dead ends: 97 [2022-11-20 09:31:11,669 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 09:31:11,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=541, Invalid=2884, Unknown=1, NotChecked=114, Total=3540 [2022-11-20 09:31:11,672 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:11,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 211 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-20 09:31:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 09:31:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-11-20 09:31:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2022-11-20 09:31:11,676 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 41 [2022-11-20 09:31:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2022-11-20 09:31:11,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 39 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2022-11-20 09:31:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 09:31:11,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:11,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:11,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 09:31:11,884 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 221421661, now seen corresponding path program 4 times [2022-11-20 09:31:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071053661] [2022-11-20 09:31:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:31:12,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071053661] [2022-11-20 09:31:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071053661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047606334] [2022-11-20 09:31:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:12,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:12,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:12,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:31:12,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 09:31:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:12,940 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:31:12,940 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 09:31:12,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:31:14,911 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-20 09:31:14,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 59 [2022-11-20 09:31:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:15,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:17,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-11-20 09:31:17,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:17,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 78 [2022-11-20 09:31:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:17,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047606334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:17,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:17,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 24] total 54 [2022-11-20 09:31:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331848518] [2022-11-20 09:31:17,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 09:31:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 09:31:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2703, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 09:31:17,400 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:19,861 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-11-20 09:31:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:31:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 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 44 [2022-11-20 09:31:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:19,863 INFO L225 Difference]: With dead ends: 107 [2022-11-20 09:31:19,863 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 09:31:19,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=717, Invalid=5445, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 09:31:19,866 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:19,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 233 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-11-20 09:31:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 09:31:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2022-11-20 09:31:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2022-11-20 09:31:19,870 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 44 [2022-11-20 09:31:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:19,871 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2022-11-20 09:31:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2022-11-20 09:31:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 09:31:19,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:19,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:19,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:20,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 09:31:20,075 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1189913483, now seen corresponding path program 5 times [2022-11-20 09:31:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615353121] [2022-11-20 09:31:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615353121] [2022-11-20 09:31:21,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615353121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068753787] [2022-11-20 09:31:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:21,068 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:21,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:31:21,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:31:21,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 09:31:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:21,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:31:22,452 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-11-20 09:31:22,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 09:31:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:22,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:24,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-20 09:31:24,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:24,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2022-11-20 09:31:24,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-20 09:31:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068753787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:24,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:24,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 52 [2022-11-20 09:31:24,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593326406] [2022-11-20 09:31:24,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:24,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 09:31:24,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 09:31:24,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2515, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 09:31:24,419 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 53 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:28,036 INFO L93 Difference]: Finished difference Result 253 states and 279 transitions. [2022-11-20 09:31:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 09:31:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 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 44 [2022-11-20 09:31:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:28,039 INFO L225 Difference]: With dead ends: 253 [2022-11-20 09:31:28,039 INFO L226 Difference]: Without dead ends: 253 [2022-11-20 09:31:28,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=918, Invalid=7092, Unknown=0, NotChecked=0, Total=8010 [2022-11-20 09:31:28,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:28,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 459 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-11-20 09:31:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-20 09:31:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2022-11-20 09:31:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 196 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2022-11-20 09:31:28,049 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 44 [2022-11-20 09:31:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2022-11-20 09:31:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2022-11-20 09:31:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 09:31:28,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:28,051 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:28,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 09:31:28,264 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 789612329, now seen corresponding path program 6 times [2022-11-20 09:31:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933166148] [2022-11-20 09:31:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:31:28,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933166148] [2022-11-20 09:31:28,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933166148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915856912] [2022-11-20 09:31:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:31:28,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:28,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:29,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:31:29,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 09:31:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:29,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 09:31:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:29,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 09:31:30,844 INFO L321 Elim1Store]: treesize reduction 12, result has 72.1 percent of original size [2022-11-20 09:31:30,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 46 [2022-11-20 09:31:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:32,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-11-20 09:31:32,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:31:32,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:32,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2022-11-20 09:31:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 09:31:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915856912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:32,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:32,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 19] total 49 [2022-11-20 09:31:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141071033] [2022-11-20 09:31:32,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 09:31:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 09:31:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 09:31:32,935 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:42,447 INFO L93 Difference]: Finished difference Result 311 states and 348 transitions. [2022-11-20 09:31:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 09:31:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 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 50 [2022-11-20 09:31:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:42,449 INFO L225 Difference]: With dead ends: 311 [2022-11-20 09:31:42,449 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 09:31:42,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=963, Invalid=7775, Unknown=4, NotChecked=0, Total=8742 [2022-11-20 09:31:42,452 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:42,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 268 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 130 Unchecked, 0.0s Time] [2022-11-20 09:31:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 09:31:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 150. [2022-11-20 09:31:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 148 states have (on average 1.135135135135135) internal successors, (168), 149 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2022-11-20 09:31:42,459 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 50 [2022-11-20 09:31:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:42,460 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2022-11-20 09:31:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.673469387755102) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2022-11-20 09:31:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 09:31:42,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:42,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:42,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 09:31:42,668 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:31:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 329896815, now seen corresponding path program 2 times [2022-11-20 09:31:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:42,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714732945] [2022-11-20 09:31:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714732945] [2022-11-20 09:31:44,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714732945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328956678] [2022-11-20 09:31:44,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:44,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:44,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:31:44,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 09:31:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:44,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:31:44,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:31:44,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:31:48,782 INFO L321 Elim1Store]: treesize reduction 28, result has 82.3 percent of original size [2022-11-20 09:31:48,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 64 treesize of output 154 [2022-11-20 09:31:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:49,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:52,360 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~s~0#1.offset_82| Int) (|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46| Int) (v_ArrVal_375 (Array Int Int)) (|v_ULTIMATE.start_cstrspn_~s~0#1.base_84| Int) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_375))) (let ((.cse0 (select (select .cse3 |v_ULTIMATE.start_cstrspn_~s~0#1.base_84|) |v_ULTIMATE.start_cstrspn_~s~0#1.offset_82|)) (.cse1 (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse2 (select (select .cse3 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (not (<= 0 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46|)) (not (= .cse0 (select .cse1 (+ 2 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46|)))) (= 49 .cse0) (<= (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46|) (= 49 (select .cse1 (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46| 1))) (not (= .cse2 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_46|))) (= 49 .cse2))))) is different from false [2022-11-20 09:31:52,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:52,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 82 [2022-11-20 09:31:52,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:52,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 321 [2022-11-20 09:31:52,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:31:52,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 142 treesize of output 178 [2022-11-20 09:31:52,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:32:07,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:32:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:32:07,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328956678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:07,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:07,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 67 [2022-11-20 09:32:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648728653] [2022-11-20 09:32:07,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:07,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 09:32:07,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 09:32:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=4008, Unknown=1, NotChecked=130, Total=4556 [2022-11-20 09:32:07,365 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:11,989 INFO L93 Difference]: Finished difference Result 242 states and 269 transitions. [2022-11-20 09:32:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 09:32:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 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 54 [2022-11-20 09:32:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:11,990 INFO L225 Difference]: With dead ends: 242 [2022-11-20 09:32:11,991 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 09:32:11,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1297, Invalid=8806, Unknown=1, NotChecked=198, Total=10302 [2022-11-20 09:32:11,993 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:11,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 215 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-11-20 09:32:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 09:32:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 188. [2022-11-20 09:32:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1397849462365592) internal successors, (212), 187 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 212 transitions. [2022-11-20 09:32:11,998 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 212 transitions. Word has length 54 [2022-11-20 09:32:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:11,999 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 212 transitions. [2022-11-20 09:32:11,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 212 transitions. [2022-11-20 09:32:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 09:32:12,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:12,000 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:12,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:12,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:12,211 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:32:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1679731515, now seen corresponding path program 3 times [2022-11-20 09:32:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:12,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630580757] [2022-11-20 09:32:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:12,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:32:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630580757] [2022-11-20 09:32:14,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630580757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220850711] [2022-11-20 09:32:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:14,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:14,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:32:14,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:32:14,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 09:32:14,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:32:14,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:32:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:32:16,234 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-20 09:32:16,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-20 09:32:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:32:16,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:20,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:20,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-11-20 09:32:20,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:20,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 116 [2022-11-20 09:32:20,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:20,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2022-11-20 09:32:20,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 09:32:21,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:32:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:32:21,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220850711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:21,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:21,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 19] total 54 [2022-11-20 09:32:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462918] [2022-11-20 09:32:21,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:21,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 09:32:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 09:32:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2690, Unknown=1, NotChecked=0, Total=2970 [2022-11-20 09:32:21,340 INFO L87 Difference]: Start difference. First operand 188 states and 212 transitions. Second operand has 55 states, 54 states have (on average 2.740740740740741) internal successors, (148), 55 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:24,422 INFO L93 Difference]: Finished difference Result 259 states and 290 transitions. [2022-11-20 09:32:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 09:32:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.740740740740741) internal successors, (148), 55 states have internal predecessors, (148), 0 states have call successors, (0), 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 60 [2022-11-20 09:32:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:24,425 INFO L225 Difference]: With dead ends: 259 [2022-11-20 09:32:24,425 INFO L226 Difference]: Without dead ends: 259 [2022-11-20 09:32:24,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1029, Invalid=6802, Unknown=1, NotChecked=0, Total=7832 [2022-11-20 09:32:24,426 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:24,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 285 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-20 09:32:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-20 09:32:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 188. [2022-11-20 09:32:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1397849462365592) internal successors, (212), 187 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 212 transitions. [2022-11-20 09:32:24,443 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 212 transitions. Word has length 60 [2022-11-20 09:32:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:24,444 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 212 transitions. [2022-11-20 09:32:24,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.740740740740741) internal successors, (148), 55 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 212 transitions. [2022-11-20 09:32:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 09:32:24,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:24,446 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:24,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:24,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 09:32:24,653 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-20 09:32:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -88509689, now seen corresponding path program 4 times [2022-11-20 09:32:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79152099] [2022-11-20 09:32:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 1 proven. 106 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:32:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79152099] [2022-11-20 09:32:26,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79152099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427754659] [2022-11-20 09:32:26,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:26,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:26,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:26,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:26,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e56e13-0602-4feb-8812-dc161752b109/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:32:27,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:27,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 09:32:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:27,189 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:32:27,189 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 09:32:27,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:32:27,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-20 09:32:27,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-20 09:32:33,036 INFO L321 Elim1Store]: treesize reduction 45, result has 81.1 percent of original size [2022-11-20 09:32:33,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 75 treesize of output 220 [2022-11-20 09:32:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:32:36,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:42,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:42,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 100 [2022-11-20 09:32:42,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:42,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 301 treesize of output 451 [2022-11-20 09:32:42,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:32:42,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 198 treesize of output 268