./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/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_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:43:04,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:43:04,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:43:04,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:43:04,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:43:04,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:43:04,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:43:04,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:43:04,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:43:04,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:43:04,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:43:04,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:43:04,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:43:04,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:43:04,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:43:04,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:43:04,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:43:04,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:43:04,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:43:04,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:43:04,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:43:04,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:43:04,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:43:04,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:43:04,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:43:04,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:43:04,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:43:04,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:43:04,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:43:04,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:43:04,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:43:04,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:43:04,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:43:04,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:43:04,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:43:04,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:43:04,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:43:04,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:43:04,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:43:04,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:43:04,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:43:04,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:43:04,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:43:04,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:43:04,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:43:04,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:43:04,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:43:04,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:43:04,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:43:04,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:43:04,214 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:43:04,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:43:04,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:43:04,214 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:43:04,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:43:04,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:43:04,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:43:04,218 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:43:04,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:43:04,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:43:04,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:43:04,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:43:04,219 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:43:04,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:43:04,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:43:04,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:43:04,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:43:04,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:04,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:43:04,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:43:04,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:43:04,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:43:04,223 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_124c6569-a8a4-49b1-93cf-dec7e0c29328/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2022-11-20 11:43:04,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:43:04,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:43:04,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:43:04,691 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:43:04,691 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:43:04,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-11-20 11:43:07,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:43:08,148 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:43:08,148 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-11-20 11:43:08,177 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/data/4301dc3c9/851606a0450842e1ac7cfdc3ada400da/FLAG6d7b4f429 [2022-11-20 11:43:08,243 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/data/4301dc3c9/851606a0450842e1ac7cfdc3ada400da [2022-11-20 11:43:08,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:43:08,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:43:08,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:08,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:43:08,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:43:08,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384910ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08, skipping insertion in model container [2022-11-20 11:43:08,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:43:08,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:43:08,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:08,753 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:43:08,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:08,863 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:43:08,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08 WrapperNode [2022-11-20 11:43:08,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:08,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:08,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:43:08,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:43:08,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,938 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-11-20 11:43:08,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:08,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:43:08,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:43:08,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:43:08,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:08,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:43:08,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:43:08,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:43:08,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:43:08,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (1/1) ... [2022-11-20 11:43:09,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:09,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:43:09,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:43:09,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:43:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:43:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:43:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:43:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:43:09,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:43:09,318 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:43:09,321 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:43:09,697 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:43:09,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:43:09,705 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:43:09,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:09 BoogieIcfgContainer [2022-11-20 11:43:09,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:43:09,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:43:09,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:43:09,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:43:09,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:43:08" (1/3) ... [2022-11-20 11:43:09,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706c0002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:09, skipping insertion in model container [2022-11-20 11:43:09,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08" (2/3) ... [2022-11-20 11:43:09,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706c0002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:09, skipping insertion in model container [2022-11-20 11:43:09,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:09" (3/3) ... [2022-11-20 11:43:09,733 INFO L112 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2022-11-20 11:43:09,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:43:09,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-20 11:43:09,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:09,840 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;@5eeb0e40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:09,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-20 11:43:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:09,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:09,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:09,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-20 11:43:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421134703] [2022-11-20 11:43:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:09,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421134703] [2022-11-20 11:43:10,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421134703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:10,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:10,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820917408] [2022-11-20 11:43:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:10,231 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:10,293 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-11-20 11:43:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:43:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:10,308 INFO L225 Difference]: With dead ends: 96 [2022-11-20 11:43:10,308 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:43:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:10,321 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:10,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:43:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-11-20 11:43:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 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 11:43:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-20 11:43:10,372 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-11-20 11:43:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:10,373 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-20 11:43:10,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-20 11:43:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:10,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:10,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:10,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:43:10,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-11-20 11:43:10,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121678926] [2022-11-20 11:43:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:10,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121678926] [2022-11-20 11:43:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121678926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:10,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653667904] [2022-11-20 11:43:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:10,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:10,828 INFO L87 Difference]: Start difference. First operand 53 states and 61 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 11:43:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:10,918 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-20 11:43:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:10,919 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 11:43:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:10,920 INFO L225 Difference]: With dead ends: 51 [2022-11-20 11:43:10,920 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 11:43:10,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:10,922 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:10,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 11:43:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-20 11:43:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 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 11:43:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-20 11:43:10,929 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-11-20 11:43:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:10,930 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-20 11:43:10,930 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 11:43:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-20 11:43:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:10,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:10,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:10,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:43:10,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-20 11:43:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:10,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901446219] [2022-11-20 11:43:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901446219] [2022-11-20 11:43:11,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901446219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:11,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:11,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:11,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058449137] [2022-11-20 11:43:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:11,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:43:11,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:43:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:11,246 INFO L87 Difference]: Start difference. First operand 51 states and 59 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 11:43:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:11,492 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-11-20 11:43:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:11,493 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 11:43:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:11,494 INFO L225 Difference]: With dead ends: 93 [2022-11-20 11:43:11,494 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 11:43:11,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:11,496 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 99 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:11,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 90 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 11:43:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-11-20 11:43:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 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 11:43:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-20 11:43:11,503 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-11-20 11:43:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:11,504 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-20 11:43:11,504 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 11:43:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-20 11:43:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:11,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:11,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:43:11,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-11-20 11:43:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:11,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909484580] [2022-11-20 11:43:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:11,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:11,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909484580] [2022-11-20 11:43:11,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909484580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:11,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:11,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407198589] [2022-11-20 11:43:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:11,772 INFO L87 Difference]: Start difference. First operand 53 states and 62 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 11:43:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:11,852 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-11-20 11:43:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:11,853 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 11:43:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:11,856 INFO L225 Difference]: With dead ends: 90 [2022-11-20 11:43:11,857 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 11:43:11,857 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 11:43:11,865 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:11,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 86 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 11:43:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2022-11-20 11:43:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-11-20 11:43:11,872 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 9 [2022-11-20 11:43:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:11,872 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-11-20 11:43:11,872 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 11:43:11,872 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-11-20 11:43:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:11,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:11,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:11,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:43:11,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-11-20 11:43:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164020440] [2022-11-20 11:43:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:11,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:11,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164020440] [2022-11-20 11:43:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164020440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:11,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:11,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071371502] [2022-11-20 11:43:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:11,963 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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 11:43:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:11,998 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2022-11-20 11:43:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 11:43:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:12,000 INFO L225 Difference]: With dead ends: 105 [2022-11-20 11:43:12,000 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 11:43:12,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:12,002 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:12,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 11:43:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2022-11-20 11:43:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-11-20 11:43:12,016 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 9 [2022-11-20 11:43:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:12,016 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-11-20 11:43:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 11:43:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-11-20 11:43:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:12,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:12,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:43:12,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-11-20 11:43:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092228098] [2022-11-20 11:43:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092228098] [2022-11-20 11:43:12,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092228098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:12,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:12,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007812206] [2022-11-20 11:43:12,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:12,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:12,100 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 11:43:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:12,135 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-20 11:43:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 11:43:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:12,137 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:43:12,137 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 11:43:12,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:12,138 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:12,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 11:43:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-20 11:43:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-11-20 11:43:12,154 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 9 [2022-11-20 11:43:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:12,154 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-11-20 11:43:12,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 11:43:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-11-20 11:43:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:12,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:12,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:43:12,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-11-20 11:43:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710924822] [2022-11-20 11:43:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:12,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:12,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710924822] [2022-11-20 11:43:12,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710924822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:12,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:12,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:43:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358663108] [2022-11-20 11:43:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:43:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:43:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:12,350 INFO L87 Difference]: Start difference. First operand 70 states and 84 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 11:43:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:12,480 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2022-11-20 11:43:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:43:12,481 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 11:43:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:12,482 INFO L225 Difference]: With dead ends: 109 [2022-11-20 11:43:12,482 INFO L226 Difference]: Without dead ends: 109 [2022-11-20 11:43:12,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:43:12,483 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 208 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:12,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 80 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-20 11:43:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2022-11-20 11:43:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-11-20 11:43:12,490 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 9 [2022-11-20 11:43:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:12,490 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-11-20 11:43:12,491 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 11:43:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-11-20 11:43:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:12,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:12,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:43:12,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-11-20 11:43:12,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484295154] [2022-11-20 11:43:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:12,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:12,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484295154] [2022-11-20 11:43:12,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484295154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:12,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:12,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:12,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228214220] [2022-11-20 11:43:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:12,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:43:12,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:43:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:12,639 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 11:43:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:12,685 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-11-20 11:43:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 11:43:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:12,687 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:43:12,687 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 11:43:12,687 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 11:43:12,688 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:12,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 11:43:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-11-20 11:43:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-20 11:43:12,693 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-11-20 11:43:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:12,694 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-20 11:43:12,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 11:43:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-20 11:43:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:43:12,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:12,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:43:12,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-11-20 11:43:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494479586] [2022-11-20 11:43:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494479586] [2022-11-20 11:43:12,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494479586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:12,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:12,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394975682] [2022-11-20 11:43:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:12,797 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:12,845 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-11-20 11:43:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:43:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:12,847 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:43:12,847 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:43:12,847 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 11:43:12,848 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:12,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 79 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:43:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-11-20 11:43:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-11-20 11:43:12,854 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 10 [2022-11-20 11:43:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:12,854 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-11-20 11:43:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-11-20 11:43:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:43:12,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:12,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:43:12,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-11-20 11:43:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375872553] [2022-11-20 11:43:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:13,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375872553] [2022-11-20 11:43:13,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375872553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:13,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:13,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:43:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730941611] [2022-11-20 11:43:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:43:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:43:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:13,105 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:13,222 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2022-11-20 11:43:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:43:13,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:43:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:13,224 INFO L225 Difference]: With dead ends: 95 [2022-11-20 11:43:13,224 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 11:43:13,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:13,226 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 147 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:13,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 11:43:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2022-11-20 11:43:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-11-20 11:43:13,230 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 10 [2022-11-20 11:43:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:13,231 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-11-20 11:43:13,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-11-20 11:43:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:43:13,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:13,232 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:43:13,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-20 11:43:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763396929] [2022-11-20 11:43:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763396929] [2022-11-20 11:43:13,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763396929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:13,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578530116] [2022-11-20 11:43:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:13,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:43:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:43:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:13,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:13,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 11:43:13,740 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 11:43:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:14,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:43:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:14,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578530116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:14,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:14,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-20 11:43:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841302091] [2022-11-20 11:43:14,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:14,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:43:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:43:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:43:14,215 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:14,715 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-11-20 11:43:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:43:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:43:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:14,717 INFO L225 Difference]: With dead ends: 109 [2022-11-20 11:43:14,717 INFO L226 Difference]: Without dead ends: 109 [2022-11-20 11:43:14,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:43:14,718 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 474 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:14,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 227 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-20 11:43:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 60. [2022-11-20 11:43:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-20 11:43:14,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 11 [2022-11-20 11:43:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:14,722 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-20 11:43:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-20 11:43:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:43:14,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:14,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:14,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:14,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:43:14,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-11-20 11:43:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:14,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663234965] [2022-11-20 11:43:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:14,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:15,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:15,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663234965] [2022-11-20 11:43:15,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663234965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:15,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:15,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:43:15,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973299374] [2022-11-20 11:43:15,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:15,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:43:15,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:43:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:15,079 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:15,195 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-11-20 11:43:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:43:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:43:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:15,196 INFO L225 Difference]: With dead ends: 100 [2022-11-20 11:43:15,196 INFO L226 Difference]: Without dead ends: 100 [2022-11-20 11:43:15,197 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 11:43:15,197 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 235 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:15,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 81 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-20 11:43:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2022-11-20 11:43:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.5) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-11-20 11:43:15,201 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 12 [2022-11-20 11:43:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:15,201 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-11-20 11:43:15,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-11-20 11:43:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:43:15,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:15,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:15,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:43:15,204 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-11-20 11:43:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:15,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922233520] [2022-11-20 11:43:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:15,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922233520] [2022-11-20 11:43:15,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922233520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:15,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:15,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840550049] [2022-11-20 11:43:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:15,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:15,252 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:15,298 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-11-20 11:43:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:43:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:15,300 INFO L225 Difference]: With dead ends: 60 [2022-11-20 11:43:15,300 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 11:43:15,301 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 11:43:15,301 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:15,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 11:43:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-20 11:43:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-20 11:43:15,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 12 [2022-11-20 11:43:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:15,305 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-20 11:43:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-20 11:43:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:43:15,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:15,307 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:43:15,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-11-20 11:43:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:15,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939987672] [2022-11-20 11:43:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939987672] [2022-11-20 11:43:15,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939987672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106681447] [2022-11-20 11:43:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:15,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:15,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:43:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:43:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:15,715 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:43:15,715 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 11 treesize of output 17 [2022-11-20 11:43:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:15,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106681447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:16,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:16,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-20 11:43:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906524795] [2022-11-20 11:43:16,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:43:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:43:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:43:16,347 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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 11:43:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:16,837 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-11-20 11:43:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:43:16,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) Word has length 13 [2022-11-20 11:43:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:16,838 INFO L225 Difference]: With dead ends: 117 [2022-11-20 11:43:16,838 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:43:16,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:43:16,839 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 627 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:16,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 241 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:43:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:43:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 58. [2022-11-20 11:43:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.446808510638298) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-11-20 11:43:16,842 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 13 [2022-11-20 11:43:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:16,843 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-11-20 11:43:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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 11:43:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-11-20 11:43:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:43:16,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:16,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:16,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:17,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2022-11-20 11:43:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79426652] [2022-11-20 11:43:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:17,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:17,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79426652] [2022-11-20 11:43:17,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79426652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:17,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:17,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130335080] [2022-11-20 11:43:17,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:43:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:43:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:17,123 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:17,185 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-11-20 11:43:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:43:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:17,187 INFO L225 Difference]: With dead ends: 58 [2022-11-20 11:43:17,187 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 11:43:17,189 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 11:43:17,190 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:17,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 62 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 11:43:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-20 11:43:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-20 11:43:17,192 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 14 [2022-11-20 11:43:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:17,193 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-20 11:43:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-20 11:43:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:43:17,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:17,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:43:17,194 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2022-11-20 11:43:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:17,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960490677] [2022-11-20 11:43:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960490677] [2022-11-20 11:43:17,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960490677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:17,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:17,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:43:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354124873] [2022-11-20 11:43:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:43:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:43:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:43:17,386 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:17,508 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-11-20 11:43:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:43:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:43:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:17,509 INFO L225 Difference]: With dead ends: 74 [2022-11-20 11:43:17,509 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 11:43:17,510 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 11:43:17,510 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 208 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:17,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 82 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 11:43:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2022-11-20 11:43:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.4) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-11-20 11:43:17,513 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 14 [2022-11-20 11:43:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:17,513 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-11-20 11:43:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-11-20 11:43:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:43:17,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:17,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:17,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:43:17,514 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378887, now seen corresponding path program 1 times [2022-11-20 11:43:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:17,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569522955] [2022-11-20 11:43:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:17,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:17,758 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 11:43:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569522955] [2022-11-20 11:43:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569522955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:17,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:17,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:43:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314301263] [2022-11-20 11:43:17,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:43:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:43:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:43:17,761 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:17,813 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-11-20 11:43:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:43:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:43:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:17,814 INFO L225 Difference]: With dead ends: 62 [2022-11-20 11:43:17,814 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 11:43:17,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:43:17,815 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 91 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:17,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 11:43:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-20 11:43:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-11-20 11:43:17,817 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2022-11-20 11:43:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:17,817 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-11-20 11:43:17,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-11-20 11:43:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:43:17,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:17,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:17,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:43:17,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2022-11-20 11:43:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965519411] [2022-11-20 11:43:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:17,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:17,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965519411] [2022-11-20 11:43:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965519411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:17,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:17,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802577040] [2022-11-20 11:43:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:17,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:17,964 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:17,989 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-11-20 11:43:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-20 11:43:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:17,990 INFO L225 Difference]: With dead ends: 58 [2022-11-20 11:43:17,990 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 11:43:17,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:17,991 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:17,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 11:43:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-20 11:43:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-20 11:43:17,996 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2022-11-20 11:43:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:17,996 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-20 11:43:17,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-20 11:43:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:43:17,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:17,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:43:17,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2022-11-20 11:43:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48907598] [2022-11-20 11:43:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:18,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48907598] [2022-11-20 11:43:18,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48907598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:18,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:18,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:43:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643480814] [2022-11-20 11:43:18,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:43:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:43:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:18,066 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:18,116 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-11-20 11:43:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:43:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:18,117 INFO L225 Difference]: With dead ends: 55 [2022-11-20 11:43:18,118 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 11:43:18,118 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 11:43:18,119 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:18,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 11:43:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-20 11:43:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-11-20 11:43:18,121 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2022-11-20 11:43:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:18,122 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-11-20 11:43:18,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-11-20 11:43:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:43:18,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:18,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:43:18,123 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2022-11-20 11:43:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332609240] [2022-11-20 11:43:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332609240] [2022-11-20 11:43:18,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332609240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:18,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:18,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:43:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037234481] [2022-11-20 11:43:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:18,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:43:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:43:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:43:18,271 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:18,468 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2022-11-20 11:43:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:43:18,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:43:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:18,469 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:43:18,470 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:43:18,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:43:18,470 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 158 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:18,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 86 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:43:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2022-11-20 11:43:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-11-20 11:43:18,473 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2022-11-20 11:43:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:18,473 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-11-20 11:43:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-11-20 11:43:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:43:18,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:18,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:18,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:43:18,474 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2022-11-20 11:43:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:18,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749941894] [2022-11-20 11:43:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:18,509 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 11:43:18,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:18,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749941894] [2022-11-20 11:43:18,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749941894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:18,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:18,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616200626] [2022-11-20 11:43:18,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:18,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:18,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:18,511 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:18,518 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-11-20 11:43:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:43:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:18,520 INFO L225 Difference]: With dead ends: 62 [2022-11-20 11:43:18,520 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 11:43:18,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:18,521 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 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 11:43:18,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 11:43:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-20 11:43:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-11-20 11:43:18,523 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2022-11-20 11:43:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:18,524 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-11-20 11:43:18,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-11-20 11:43:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:43:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:18,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:18,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:43:18,525 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2022-11-20 11:43:18,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:18,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117080207] [2022-11-20 11:43:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:18,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:18,591 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 11:43:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117080207] [2022-11-20 11:43:18,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117080207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:18,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:18,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:43:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821010295] [2022-11-20 11:43:18,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:18,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:43:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:43:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:43:18,593 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:18,660 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-11-20 11:43:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:43:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:43:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:18,663 INFO L225 Difference]: With dead ends: 66 [2022-11-20 11:43:18,663 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 11:43:18,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:43:18,664 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:18,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:43:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 11:43:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-11-20 11:43:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-20 11:43:18,667 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2022-11-20 11:43:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:18,667 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-20 11:43:18,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-20 11:43:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 11:43:18,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:18,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:43:18,669 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2022-11-20 11:43:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108905164] [2022-11-20 11:43:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:19,075 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 11:43:19,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108905164] [2022-11-20 11:43:19,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108905164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:19,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:19,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 11:43:19,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348999307] [2022-11-20 11:43:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:19,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:43:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:43:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:43:19,077 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:19,559 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-11-20 11:43:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:43:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 11:43:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:19,561 INFO L225 Difference]: With dead ends: 112 [2022-11-20 11:43:19,561 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 11:43:19,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:43:19,562 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 155 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:19,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 249 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 11:43:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2022-11-20 11:43:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-11-20 11:43:19,565 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2022-11-20 11:43:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:19,566 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-11-20 11:43:19,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-11-20 11:43:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 11:43:19,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:19,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:19,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:43:19,568 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2022-11-20 11:43:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489514577] [2022-11-20 11:43:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:20,029 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 11:43:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:20,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489514577] [2022-11-20 11:43:20,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489514577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:20,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:20,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:43:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501549983] [2022-11-20 11:43:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:43:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:43:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:43:20,032 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:20,773 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-11-20 11:43:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:43:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 11:43:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:20,775 INFO L225 Difference]: With dead ends: 139 [2022-11-20 11:43:20,775 INFO L226 Difference]: Without dead ends: 139 [2022-11-20 11:43:20,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:43:20,776 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 158 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:20,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 268 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-20 11:43:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2022-11-20 11:43:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-20 11:43:20,779 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-11-20 11:43:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:20,779 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-20 11:43:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-20 11:43:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:43:20,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:20,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:20,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:43:20,781 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2022-11-20 11:43:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:20,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263536367] [2022-11-20 11:43:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:21,265 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 11:43:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263536367] [2022-11-20 11:43:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263536367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:21,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:21,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:43:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298028822] [2022-11-20 11:43:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:43:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:43:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:43:21,268 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:21,994 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-11-20 11:43:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:43:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:43:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:21,995 INFO L225 Difference]: With dead ends: 102 [2022-11-20 11:43:21,996 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:43:21,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:43:21,997 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:21,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 252 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:43:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-20 11:43:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-11-20 11:43:22,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2022-11-20 11:43:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:22,001 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-11-20 11:43:22,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-11-20 11:43:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:43:22,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:22,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:22,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:43:22,002 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2022-11-20 11:43:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197640341] [2022-11-20 11:43:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:22,309 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 11:43:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197640341] [2022-11-20 11:43:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197640341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:22,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:22,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:43:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657578878] [2022-11-20 11:43:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:43:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:43:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:43:22,314 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:22,460 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-11-20 11:43:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:43:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:43:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:22,462 INFO L225 Difference]: With dead ends: 77 [2022-11-20 11:43:22,462 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 11:43:22,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:43:22,462 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:22,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 153 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 11:43:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-11-20 11:43:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-20 11:43:22,465 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-11-20 11:43:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:22,465 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-20 11:43:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-20 11:43:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:43:22,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:22,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:22,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:43:22,466 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2022-11-20 11:43:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566481333] [2022-11-20 11:43:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:22,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566481333] [2022-11-20 11:43:22,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566481333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:22,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:22,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:43:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431776064] [2022-11-20 11:43:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:43:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:43:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:43:22,773 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:22,984 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-11-20 11:43:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:43:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 11:43:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:22,985 INFO L225 Difference]: With dead ends: 67 [2022-11-20 11:43:22,986 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 11:43:22,986 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 11:43:22,987 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:22,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 185 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 11:43:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-20 11:43:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-20 11:43:22,991 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2022-11-20 11:43:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:22,991 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-20 11:43:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-20 11:43:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:43:22,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:22,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:43:22,994 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2022-11-20 11:43:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440502430] [2022-11-20 11:43:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440502430] [2022-11-20 11:43:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440502430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:23,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:23,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:43:23,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280142038] [2022-11-20 11:43:23,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:23,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:43:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:43:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:43:23,287 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:23,479 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-20 11:43:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:43:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 11:43:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:23,480 INFO L225 Difference]: With dead ends: 63 [2022-11-20 11:43:23,480 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 11:43:23,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:43:23,481 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:23,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 164 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:43:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 11:43:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-11-20 11:43:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-11-20 11:43:23,488 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2022-11-20 11:43:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:23,488 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-11-20 11:43:23,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-11-20 11:43:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:43:23,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:23,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:23,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 11:43:23,490 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2022-11-20 11:43:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127762305] [2022-11-20 11:43:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:23,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127762305] [2022-11-20 11:43:23,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127762305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:23,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307616063] [2022-11-20 11:43:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:23,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:43:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:43:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:24,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:24,360 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 5 treesize of output 3 [2022-11-20 11:43:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:24,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307616063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:24,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-20 11:43:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005817662] [2022-11-20 11:43:24,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:43:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:43:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:43:24,427 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:24,804 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-11-20 11:43:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:43:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 11:43:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:24,806 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:43:24,806 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 11:43:24,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:43:24,807 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 416 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:24,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 133 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 11:43:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-11-20 11:43:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-11-20 11:43:24,809 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2022-11-20 11:43:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:24,810 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-11-20 11:43:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-11-20 11:43:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:43:24,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:24,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:24,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:43:25,022 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2022-11-20 11:43:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964579254] [2022-11-20 11:43:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:25,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964579254] [2022-11-20 11:43:25,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964579254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:25,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158706082] [2022-11-20 11:43:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:25,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:25,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:25,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:25,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:43:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:43:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:25,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:25,715 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 5 treesize of output 3 [2022-11-20 11:43:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:25,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158706082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:25,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:25,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-20 11:43:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848642246] [2022-11-20 11:43:25,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:43:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:43:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:43:25,759 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:26,017 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-11-20 11:43:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 11:43:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:26,019 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:43:26,019 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:43:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:43:26,020 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 353 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:26,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 140 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:43:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-11-20 11:43:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-11-20 11:43:26,024 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2022-11-20 11:43:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:26,025 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-11-20 11:43:26,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-11-20 11:43:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:43:26,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:26,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:26,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:26,233 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2022-11-20 11:43:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:26,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471015913] [2022-11-20 11:43:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:26,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:26,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471015913] [2022-11-20 11:43:26,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471015913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006620251] [2022-11-20 11:43:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:26,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:26,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:26,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:43:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:43:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:26,986 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 5 treesize of output 3 [2022-11-20 11:43:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:27,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006620251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:27,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:27,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-20 11:43:27,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423267959] [2022-11-20 11:43:27,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:43:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:43:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:43:27,031 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:27,401 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-11-20 11:43:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:43:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 11:43:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:27,402 INFO L225 Difference]: With dead ends: 80 [2022-11-20 11:43:27,403 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 11:43:27,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:43:27,404 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 323 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:27,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 127 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 11:43:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-11-20 11:43:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-11-20 11:43:27,406 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 33 [2022-11-20 11:43:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:27,406 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-11-20 11:43:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-11-20 11:43:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:43:27,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:27,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:27,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:27,611 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2022-11-20 11:43:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872341570] [2022-11-20 11:43:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:28,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872341570] [2022-11-20 11:43:28,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872341570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199900808] [2022-11-20 11:43:28,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:43:28,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:28,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:28,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:43:28,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:43:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:43:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:28,619 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 11:43:29,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:29,117 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 11:43:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:29,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:30,040 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 15 treesize of output 13 [2022-11-20 11:43:30,046 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 11:43:30,054 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 24 treesize of output 20 [2022-11-20 11:43:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199900808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:30,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:30,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 36 [2022-11-20 11:43:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476869419] [2022-11-20 11:43:30,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:43:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:43:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:43:30,104 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:31,307 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2022-11-20 11:43:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:43:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 11:43:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:31,309 INFO L225 Difference]: With dead ends: 110 [2022-11-20 11:43:31,310 INFO L226 Difference]: Without dead ends: 110 [2022-11-20 11:43:31,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:43:31,312 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 291 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-11-20 11:43:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-20 11:43:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-11-20 11:43:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 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 11:43:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2022-11-20 11:43:31,318 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 36 [2022-11-20 11:43:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:31,319 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2022-11-20 11:43:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2022-11-20 11:43:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:43:31,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:31,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:31,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 11:43:31,530 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2022-11-20 11:43:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082813886] [2022-11-20 11:43:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082813886] [2022-11-20 11:43:31,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082813886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501843934] [2022-11-20 11:43:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:31,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:43:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:31,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:43:31,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:32,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:32,390 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 5 treesize of output 3 [2022-11-20 11:43:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:32,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501843934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:32,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:32,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-20 11:43:32,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500895101] [2022-11-20 11:43:32,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:32,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:43:32,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:43:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:43:32,437 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 19 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:32,909 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-11-20 11:43:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:43:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 19 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 11:43:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:32,910 INFO L225 Difference]: With dead ends: 124 [2022-11-20 11:43:32,911 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:43:32,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:43:32,913 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 433 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:32,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 121 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:43:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2022-11-20 11:43:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-11-20 11:43:32,930 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 37 [2022-11-20 11:43:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:32,930 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-11-20 11:43:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 19 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-11-20 11:43:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:43:32,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:32,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:32,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:33,139 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:33,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2022-11-20 11:43:33,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166645417] [2022-11-20 11:43:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166645417] [2022-11-20 11:43:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166645417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393869271] [2022-11-20 11:43:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:43:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:33,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:43:33,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:43:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 11:43:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:33,882 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 11:43:34,070 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 11 treesize of output 7 [2022-11-20 11:43:34,083 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 14 treesize of output 16 [2022-11-20 11:43:34,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:34,167 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 15 treesize of output 10 [2022-11-20 11:43:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:34,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:34,242 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_399 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_399) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-11-20 11:43:34,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:34,266 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 23 treesize of output 24 [2022-11-20 11:43:34,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:34,284 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 37 treesize of output 32 [2022-11-20 11:43:34,295 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 7 treesize of output 3 [2022-11-20 11:43:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393869271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:34,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:34,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-20 11:43:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467640166] [2022-11-20 11:43:34,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:34,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:43:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:43:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=392, Unknown=1, NotChecked=40, Total=506 [2022-11-20 11:43:34,467 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:34,781 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-11-20 11:43:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:43:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 11:43:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:34,783 INFO L225 Difference]: With dead ends: 104 [2022-11-20 11:43:34,783 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 11:43:34,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=588, Unknown=1, NotChecked=50, Total=756 [2022-11-20 11:43:34,784 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:34,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 246 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 11:43:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 11:43:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-11-20 11:43:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.173913043478261) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-11-20 11:43:34,787 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 42 [2022-11-20 11:43:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:34,787 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-11-20 11:43:34,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-11-20 11:43:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:43:34,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:34,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:34,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:34,988 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1763674815, now seen corresponding path program 2 times [2022-11-20 11:43:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050904337] [2022-11-20 11:43:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:35,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050904337] [2022-11-20 11:43:35,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050904337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591342932] [2022-11-20 11:43:35,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:43:35,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:35,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:43:35,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:43:35,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:43:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:35,909 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 5 treesize of output 3 [2022-11-20 11:43:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:35,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591342932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:35,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:35,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-11-20 11:43:35,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626897794] [2022-11-20 11:43:35,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:35,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:43:35,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:43:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:43:35,972 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 23 states, 22 states have (on average 4.363636363636363) internal successors, (96), 23 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:36,454 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-11-20 11:43:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:43:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.363636363636363) internal successors, (96), 23 states have internal predecessors, (96), 0 states have call successors, (0), 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 11:43:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:36,455 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:43:36,456 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:43:36,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=867, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:43:36,457 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 368 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:36,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 173 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:43:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2022-11-20 11:43:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-20 11:43:36,459 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 44 [2022-11-20 11:43:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:36,459 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-20 11:43:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.363636363636363) internal successors, (96), 23 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-20 11:43:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:43:36,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:36,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:36,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:36,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:36,667 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2022-11-20 11:43:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:36,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590861251] [2022-11-20 11:43:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:36,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590861251] [2022-11-20 11:43:36,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590861251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:36,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186410267] [2022-11-20 11:43:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:43:36,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:36,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:43:37,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:43:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:43:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:37,129 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:43:37,129 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 11:43:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:37,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:38,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186410267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:38,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:38,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 29 [2022-11-20 11:43:38,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802906796] [2022-11-20 11:43:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:38,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:43:38,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:43:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:43:38,138 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 30 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:39,085 INFO L93 Difference]: Finished difference Result 243 states and 265 transitions. [2022-11-20 11:43:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:43:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 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 46 [2022-11-20 11:43:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:39,087 INFO L225 Difference]: With dead ends: 243 [2022-11-20 11:43:39,087 INFO L226 Difference]: Without dead ends: 243 [2022-11-20 11:43:39,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=1650, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:43:39,088 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1063 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:39,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 220 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:43:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-20 11:43:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 95. [2022-11-20 11:43:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.173913043478261) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2022-11-20 11:43:39,092 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 46 [2022-11-20 11:43:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2022-11-20 11:43:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 30 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2022-11-20 11:43:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:43:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:39,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:39,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:39,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:39,303 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1301454651, now seen corresponding path program 3 times [2022-11-20 11:43:39,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:39,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70690008] [2022-11-20 11:43:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:43:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:39,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70690008] [2022-11-20 11:43:39,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70690008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:39,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756052422] [2022-11-20 11:43:39,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:43:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:39,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:39,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:43:40,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:43:40,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:43:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:40,397 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 11:43:40,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:43:40,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:40,705 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 17 treesize of output 10 [2022-11-20 11:43:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:43:40,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:40,906 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 15 treesize of output 13 [2022-11-20 11:43:40,911 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 11:43:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:43:41,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756052422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:41,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:41,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-11-20 11:43:41,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074330790] [2022-11-20 11:43:41,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:41,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 11:43:41,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 11:43:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:43:41,070 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:41,743 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2022-11-20 11:43:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:43:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 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 47 [2022-11-20 11:43:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:41,745 INFO L225 Difference]: With dead ends: 118 [2022-11-20 11:43:41,745 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:43:41,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:43:41,746 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 371 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 270 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-20 11:43:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:43:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-11-20 11:43:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 110 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-11-20 11:43:41,755 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 47 [2022-11-20 11:43:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:41,755 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-11-20 11:43:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-11-20 11:43:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:43:41,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:41,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:41,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 11:43:41,963 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash 532688685, now seen corresponding path program 1 times [2022-11-20 11:43:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661351471] [2022-11-20 11:43:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661351471] [2022-11-20 11:43:42,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661351471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422653816] [2022-11-20 11:43:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:42,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:42,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:42,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:43:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:43:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:42,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:42,860 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 5 treesize of output 3 [2022-11-20 11:43:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:42,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422653816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:42,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:42,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-11-20 11:43:42,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100552650] [2022-11-20 11:43:42,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:42,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:43:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:43:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:43:42,922 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 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 11:43:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:43,485 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-11-20 11:43:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:43:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 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 48 [2022-11-20 11:43:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:43,487 INFO L225 Difference]: With dead ends: 133 [2022-11-20 11:43:43,487 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 11:43:43,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:43:43,488 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 559 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:43,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 198 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:43:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 11:43:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2022-11-20 11:43:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-11-20 11:43:43,491 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 48 [2022-11-20 11:43:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:43,492 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-11-20 11:43:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 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 11:43:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-11-20 11:43:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:43:43,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:43,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:43,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:43,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 11:43:43,699 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -575516839, now seen corresponding path program 1 times [2022-11-20 11:43:43,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518384731] [2022-11-20 11:43:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:43,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:45,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518384731] [2022-11-20 11:43:45,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518384731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:45,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937361540] [2022-11-20 11:43:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:45,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:45,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:45,925 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:43:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:43:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:46,327 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 11:43:47,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:43:47,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:47,020 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 10 [2022-11-20 11:43:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:43:47,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:47,590 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 15 treesize of output 13 [2022-11-20 11:43:47,594 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 24 treesize of output 20 [2022-11-20 11:43:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:43:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937361540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:48,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:48,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 48 [2022-11-20 11:43:48,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475879491] [2022-11-20 11:43:48,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:43:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:43:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2109, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:43:48,057 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:51,527 INFO L93 Difference]: Finished difference Result 249 states and 271 transitions. [2022-11-20 11:43:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 11:43:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 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 51 [2022-11-20 11:43:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:51,529 INFO L225 Difference]: With dead ends: 249 [2022-11-20 11:43:51,529 INFO L226 Difference]: Without dead ends: 240 [2022-11-20 11:43:51,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=483, Invalid=5997, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 11:43:51,533 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:51,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 336 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 591 Invalid, 0 Unknown, 209 Unchecked, 0.5s Time] [2022-11-20 11:43:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-20 11:43:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 204. [2022-11-20 11:43:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 203 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2022-11-20 11:43:51,539 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 51 [2022-11-20 11:43:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:51,539 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2022-11-20 11:43:51,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2022-11-20 11:43:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:43:51,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:51,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 11:43:51,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:51,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 11:43:51,741 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash 629169992, now seen corresponding path program 4 times [2022-11-20 11:43:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:51,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273075679] [2022-11-20 11:43:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:53,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:53,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273075679] [2022-11-20 11:43:53,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273075679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:53,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445348420] [2022-11-20 11:43:53,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:43:53,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:53,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:53,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:43:53,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:43:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:43:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 11:43:53,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:53,459 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 11:43:54,498 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:43:54,498 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 38 treesize of output 26 [2022-11-20 11:43:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:43:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:55,132 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 11:43:55,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:43:55,143 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 44 treesize of output 34 [2022-11-20 11:43:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:43:55,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445348420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:55,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:55,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 48 [2022-11-20 11:43:55,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366060935] [2022-11-20 11:43:55,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:55,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:43:55,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:43:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:43:55,485 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 48 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 48 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:59,172 INFO L93 Difference]: Finished difference Result 275 states and 304 transitions. [2022-11-20 11:43:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:43:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 48 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-20 11:43:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:59,173 INFO L225 Difference]: With dead ends: 275 [2022-11-20 11:43:59,174 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 11:43:59,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=799, Invalid=6007, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 11:43:59,176 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 321 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:59,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 309 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 503 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-11-20 11:43:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 11:43:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 250. [2022-11-20 11:43:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 247 states have (on average 1.1295546558704452) internal successors, (279), 249 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 279 transitions. [2022-11-20 11:43:59,199 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 279 transitions. Word has length 51 [2022-11-20 11:43:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:59,200 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 279 transitions. [2022-11-20 11:43:59,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 48 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 279 transitions. [2022-11-20 11:43:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:43:59,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:59,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:59,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 11:43:59,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 11:43:59,405 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:43:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1038457781, now seen corresponding path program 5 times [2022-11-20 11:43:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:59,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110718825] [2022-11-20 11:43:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:43:59,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110718825] [2022-11-20 11:43:59,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110718825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644527660] [2022-11-20 11:43:59,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:43:59,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:59,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:59,939 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:59,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:44:00,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:44:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:44:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:00,112 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:44:00,112 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 11:44:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:00,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644527660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:01,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:01,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-20 11:44:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240314783] [2022-11-20 11:44:01,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:01,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:44:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:44:01,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:44:01,062 INFO L87 Difference]: Start difference. First operand 250 states and 279 transitions. Second operand has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:02,116 INFO L93 Difference]: Finished difference Result 439 states and 489 transitions. [2022-11-20 11:44:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:44:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 11:44:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:02,119 INFO L225 Difference]: With dead ends: 439 [2022-11-20 11:44:02,119 INFO L226 Difference]: Without dead ends: 439 [2022-11-20 11:44:02,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:44:02,120 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 452 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:02,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 487 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:44:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-20 11:44:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 287. [2022-11-20 11:44:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 284 states have (on average 1.1514084507042253) internal successors, (327), 286 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 327 transitions. [2022-11-20 11:44:02,129 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 327 transitions. Word has length 55 [2022-11-20 11:44:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:02,130 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 327 transitions. [2022-11-20 11:44:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 327 transitions. [2022-11-20 11:44:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:44:02,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:02,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:02,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:02,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:02,338 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2022-11-20 11:44:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:02,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798435729] [2022-11-20 11:44:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798435729] [2022-11-20 11:44:04,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798435729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525993703] [2022-11-20 11:44:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:44:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:04,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:04,303 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:04,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:44:04,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:44:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 11:44:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:04,477 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 11:44:04,551 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 11:44:04,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 11:44:05,560 INFO L321 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2022-11-20 11:44:05,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2022-11-20 11:44:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:44:05,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:06,982 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 11:44:06,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-11-20 11:44:07,004 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 11:44:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:44:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525993703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:07,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 41 [2022-11-20 11:44:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156962918] [2022-11-20 11:44:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:44:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:44:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:44:07,077 INFO L87 Difference]: Start difference. First operand 287 states and 327 transitions. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:09,231 INFO L93 Difference]: Finished difference Result 322 states and 360 transitions. [2022-11-20 11:44:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:44:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 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 57 [2022-11-20 11:44:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:09,233 INFO L225 Difference]: With dead ends: 322 [2022-11-20 11:44:09,233 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 11:44:09,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=432, Invalid=3728, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:44:09,235 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:09,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 463 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-20 11:44:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 11:44:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 211. [2022-11-20 11:44:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 210 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 237 transitions. [2022-11-20 11:44:09,241 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 237 transitions. Word has length 57 [2022-11-20 11:44:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:09,241 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 237 transitions. [2022-11-20 11:44:09,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 237 transitions. [2022-11-20 11:44:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:44:09,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:09,243 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:09,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:09,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:09,447 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash 421187170, now seen corresponding path program 2 times [2022-11-20 11:44:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970651378] [2022-11-20 11:44:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:10,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970651378] [2022-11-20 11:44:10,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970651378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:10,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68414986] [2022-11-20 11:44:10,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:44:10,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:10,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:10,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:10,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:44:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:44:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:44:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:11,057 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 11:44:11,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:44:11,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:44:11,939 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 10 [2022-11-20 11:44:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:44:11,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:12,544 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 15 treesize of output 13 [2022-11-20 11:44:12,547 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 24 treesize of output 20 [2022-11-20 11:44:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:44:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68414986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:12,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:12,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 47 [2022-11-20 11:44:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6562023] [2022-11-20 11:44:12,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:12,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:44:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:44:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:44:12,986 INFO L87 Difference]: Start difference. First operand 211 states and 237 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:15,534 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-11-20 11:44:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:44:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 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 59 [2022-11-20 11:44:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:15,536 INFO L225 Difference]: With dead ends: 313 [2022-11-20 11:44:15,536 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 11:44:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=482, Invalid=6658, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 11:44:15,539 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 623 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 548 Invalid, 0 Unknown, 212 Unchecked, 0.3s Time] [2022-11-20 11:44:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 11:44:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 298. [2022-11-20 11:44:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.1216216216216217) internal successors, (332), 297 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 332 transitions. [2022-11-20 11:44:15,546 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 332 transitions. Word has length 59 [2022-11-20 11:44:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:15,547 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 332 transitions. [2022-11-20 11:44:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 332 transitions. [2022-11-20 11:44:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:44:15,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:15,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:15,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-20 11:44:15,756 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1435414831, now seen corresponding path program 3 times [2022-11-20 11:44:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165951247] [2022-11-20 11:44:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:16,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165951247] [2022-11-20 11:44:16,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165951247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:16,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019621994] [2022-11-20 11:44:16,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:44:16,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:16,772 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:44:16,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:44:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:44:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:17,101 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 11:44:17,642 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:44:17,642 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 10 [2022-11-20 11:44:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:17,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:17,980 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 15 treesize of output 13 [2022-11-20 11:44:17,982 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 11:44:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:18,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019621994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:18,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:18,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 42 [2022-11-20 11:44:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474887172] [2022-11-20 11:44:18,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:44:18,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:44:18,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:44:18,161 INFO L87 Difference]: Start difference. First operand 298 states and 332 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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 11:44:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:22,231 INFO L93 Difference]: Finished difference Result 519 states and 571 transitions. [2022-11-20 11:44:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 11:44:22,231 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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 59 [2022-11-20 11:44:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:22,234 INFO L225 Difference]: With dead ends: 519 [2022-11-20 11:44:22,235 INFO L226 Difference]: Without dead ends: 516 [2022-11-20 11:44:22,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=658, Invalid=7898, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:44:22,237 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 574 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:22,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 938 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1955 Invalid, 0 Unknown, 331 Unchecked, 1.2s Time] [2022-11-20 11:44:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-20 11:44:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 328. [2022-11-20 11:44:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 1.1196319018404908) internal successors, (365), 327 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 365 transitions. [2022-11-20 11:44:22,249 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 365 transitions. Word has length 59 [2022-11-20 11:44:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:22,249 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 365 transitions. [2022-11-20 11:44:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 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 11:44:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 365 transitions. [2022-11-20 11:44:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:44:22,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:22,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:22,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:22,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-20 11:44:22,458 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash -733041505, now seen corresponding path program 2 times [2022-11-20 11:44:22,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:22,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924077862] [2022-11-20 11:44:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:22,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:44:22,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924077862] [2022-11-20 11:44:22,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924077862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079497870] [2022-11-20 11:44:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:44:22,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:22,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:22,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:44:23,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:44:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:44:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:44:23,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:23,556 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 5 treesize of output 3 [2022-11-20 11:44:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:44:23,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079497870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:23,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:23,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-20 11:44:23,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450231205] [2022-11-20 11:44:23,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:23,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:44:23,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:44:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:44:23,623 INFO L87 Difference]: Start difference. First operand 328 states and 365 transitions. Second operand has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:24,110 INFO L93 Difference]: Finished difference Result 387 states and 426 transitions. [2022-11-20 11:44:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:44:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 59 [2022-11-20 11:44:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:24,112 INFO L225 Difference]: With dead ends: 387 [2022-11-20 11:44:24,112 INFO L226 Difference]: Without dead ends: 386 [2022-11-20 11:44:24,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:44:24,113 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 336 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:24,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 214 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:44:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-20 11:44:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 286. [2022-11-20 11:44:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.130281690140845) internal successors, (321), 285 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 321 transitions. [2022-11-20 11:44:24,124 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 321 transitions. Word has length 59 [2022-11-20 11:44:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:24,124 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 321 transitions. [2022-11-20 11:44:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 321 transitions. [2022-11-20 11:44:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:44:24,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:24,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:24,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:24,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:24,332 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -587788338, now seen corresponding path program 3 times [2022-11-20 11:44:24,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:24,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391969627] [2022-11-20 11:44:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391969627] [2022-11-20 11:44:25,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391969627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888732376] [2022-11-20 11:44:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:44:25,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:25,527 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:25,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:44:25,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:44:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 11:44:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:25,718 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 11:44:26,047 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 11:44:26,116 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 11:44:26,699 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-20 11:44:26,699 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 30 treesize of output 23 [2022-11-20 11:44:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:26,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:27,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:44:27,276 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 23 treesize of output 24 [2022-11-20 11:44:27,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:44:27,283 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 37 treesize of output 32 [2022-11-20 11:44:27,293 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 7 treesize of output 3 [2022-11-20 11:44:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888732376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:27,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:27,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 49 [2022-11-20 11:44:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011418281] [2022-11-20 11:44:27,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:27,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:44:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:44:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2182, Unknown=18, NotChecked=0, Total=2352 [2022-11-20 11:44:27,664 INFO L87 Difference]: Start difference. First operand 286 states and 321 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:28,977 INFO L93 Difference]: Finished difference Result 452 states and 500 transitions. [2022-11-20 11:44:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:44:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 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 63 [2022-11-20 11:44:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:28,981 INFO L225 Difference]: With dead ends: 452 [2022-11-20 11:44:28,981 INFO L226 Difference]: Without dead ends: 452 [2022-11-20 11:44:28,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=321, Invalid=3821, Unknown=18, NotChecked=0, Total=4160 [2022-11-20 11:44:28,982 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 645 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1026 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2022-11-20 11:44:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-20 11:44:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 422. [2022-11-20 11:44:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.1238095238095238) internal successors, (472), 421 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 472 transitions. [2022-11-20 11:44:28,994 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 472 transitions. Word has length 63 [2022-11-20 11:44:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:28,994 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 472 transitions. [2022-11-20 11:44:28,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 472 transitions. [2022-11-20 11:44:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 11:44:28,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:28,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:29,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 11:44:29,203 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash 876255922, now seen corresponding path program 4 times [2022-11-20 11:44:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747287743] [2022-11-20 11:44:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:44:29,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747287743] [2022-11-20 11:44:29,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747287743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592821353] [2022-11-20 11:44:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:44:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:29,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:44:30,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:44:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 11:44:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:30,263 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 11:44:31,412 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:44:31,412 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 38 treesize of output 26 [2022-11-20 11:44:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:44:31,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:32,158 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 11:44:32,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:44:32,163 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 44 treesize of output 34 [2022-11-20 11:44:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:44:32,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592821353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:32,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:32,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 50 [2022-11-20 11:44:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195967321] [2022-11-20 11:44:32,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:44:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:44:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:44:32,430 INFO L87 Difference]: Start difference. First operand 422 states and 472 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:36,350 INFO L93 Difference]: Finished difference Result 411 states and 446 transitions. [2022-11-20 11:44:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 11:44:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 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 66 [2022-11-20 11:44:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:36,352 INFO L225 Difference]: With dead ends: 411 [2022-11-20 11:44:36,352 INFO L226 Difference]: Without dead ends: 408 [2022-11-20 11:44:36,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=884, Invalid=9418, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 11:44:36,354 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 211 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:36,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 361 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 575 Invalid, 0 Unknown, 145 Unchecked, 0.4s Time] [2022-11-20 11:44:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-20 11:44:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 310. [2022-11-20 11:44:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 308 states have (on average 1.1071428571428572) internal successors, (341), 309 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 341 transitions. [2022-11-20 11:44:36,363 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 341 transitions. Word has length 66 [2022-11-20 11:44:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:36,364 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 341 transitions. [2022-11-20 11:44:36,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 341 transitions. [2022-11-20 11:44:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:44:36,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:36,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:36,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:36,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 11:44:36,572 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1762293009, now seen corresponding path program 5 times [2022-11-20 11:44:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:36,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763352262] [2022-11-20 11:44:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:36,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:36,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763352262] [2022-11-20 11:44:36,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763352262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307666000] [2022-11-20 11:44:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:44:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:36,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:44:37,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:44:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:44:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:37,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:37,837 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 5 treesize of output 3 [2022-11-20 11:44:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:44:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307666000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:37,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 25 [2022-11-20 11:44:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344411535] [2022-11-20 11:44:37,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:37,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:44:37,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:44:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:44:37,941 INFO L87 Difference]: Start difference. First operand 310 states and 341 transitions. Second operand has 26 states, 25 states have (on average 5.44) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:38,884 INFO L93 Difference]: Finished difference Result 478 states and 525 transitions. [2022-11-20 11:44:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:44:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.44) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 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 67 [2022-11-20 11:44:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:38,886 INFO L225 Difference]: With dead ends: 478 [2022-11-20 11:44:38,886 INFO L226 Difference]: Without dead ends: 478 [2022-11-20 11:44:38,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:44:38,887 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 644 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:38,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 407 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:44:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-20 11:44:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2022-11-20 11:44:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 1.1142061281337048) internal successors, (400), 360 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 400 transitions. [2022-11-20 11:44:38,898 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 400 transitions. Word has length 67 [2022-11-20 11:44:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:38,898 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 400 transitions. [2022-11-20 11:44:38,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.44) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 400 transitions. [2022-11-20 11:44:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:44:38,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:38,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:38,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 11:44:39,107 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash 448824744, now seen corresponding path program 6 times [2022-11-20 11:44:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:39,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417765527] [2022-11-20 11:44:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:44:39,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:39,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417765527] [2022-11-20 11:44:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417765527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:39,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248634591] [2022-11-20 11:44:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:44:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:39,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:39,538 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:39,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:44:39,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 11:44:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:44:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:44:40,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:40,369 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 7 treesize of output 5 [2022-11-20 11:44:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:44:40,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248634591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:40,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-11-20 11:44:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080545851] [2022-11-20 11:44:40,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:44:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:44:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:44:40,465 INFO L87 Difference]: Start difference. First operand 361 states and 400 transitions. Second operand has 30 states, 29 states have (on average 5.137931034482759) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:41,583 INFO L93 Difference]: Finished difference Result 455 states and 497 transitions. [2022-11-20 11:44:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:44:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.137931034482759) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 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 67 [2022-11-20 11:44:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:41,586 INFO L225 Difference]: With dead ends: 455 [2022-11-20 11:44:41,586 INFO L226 Difference]: Without dead ends: 455 [2022-11-20 11:44:41,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:44:41,587 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 393 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:41,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 499 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:44:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-20 11:44:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 361. [2022-11-20 11:44:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 1.1114206128133706) internal successors, (399), 360 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 399 transitions. [2022-11-20 11:44:41,598 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 399 transitions. Word has length 67 [2022-11-20 11:44:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:41,599 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 399 transitions. [2022-11-20 11:44:41,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.137931034482759) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 399 transitions. [2022-11-20 11:44:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:44:41,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:41,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:41,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:41,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 11:44:41,809 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:44:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1407777257, now seen corresponding path program 4 times [2022-11-20 11:44:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214375979] [2022-11-20 11:44:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:44:42,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214375979] [2022-11-20 11:44:42,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214375979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142067423] [2022-11-20 11:44:42,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:44:42,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:42,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:42,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:44:42,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:44:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 11:44:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:42,441 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 11:44:42,494 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 11:44:42,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 11:44:45,401 INFO L321 Elim1Store]: treesize reduction 45, result has 81.1 percent of original size [2022-11-20 11:44:45,402 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 11:44:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:44:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:55,815 INFO L321 Elim1Store]: treesize reduction 37, result has 74.5 percent of original size [2022-11-20 11:44:55,816 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 1221 treesize of output 1204 [2022-11-20 11:44:55,875 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 11:45:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:45:09,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142067423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:09,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:09,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 26, 27] total 60 [2022-11-20 11:45:09,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037765026] [2022-11-20 11:45:09,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:09,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:45:09,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:45:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3293, Unknown=1, NotChecked=0, Total=3660 [2022-11-20 11:45:09,543 INFO L87 Difference]: Start difference. First operand 361 states and 399 transitions. Second operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:12,995 INFO L93 Difference]: Finished difference Result 361 states and 398 transitions. [2022-11-20 11:45:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 11:45:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.1) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 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 67 [2022-11-20 11:45:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:12,997 INFO L225 Difference]: With dead ends: 361 [2022-11-20 11:45:12,997 INFO L226 Difference]: Without dead ends: 361 [2022-11-20 11:45:12,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1081, Invalid=8230, Unknown=1, NotChecked=0, Total=9312 [2022-11-20 11:45:12,999 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:13,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 582 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2022-11-20 11:45:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-20 11:45:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-11-20 11:45:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 1.1086350974930361) internal successors, (398), 360 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 398 transitions. [2022-11-20 11:45:13,008 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 398 transitions. Word has length 67 [2022-11-20 11:45:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:13,008 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 398 transitions. [2022-11-20 11:45:13,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.1) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 398 transitions. [2022-11-20 11:45:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 11:45:13,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:13,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:13,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 11:45:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 11:45:13,216 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:45:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1263409199, now seen corresponding path program 6 times [2022-11-20 11:45:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445645318] [2022-11-20 11:45:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:13,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:13,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445645318] [2022-11-20 11:45:13,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445645318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:13,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798296759] [2022-11-20 11:45:13,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:45:13,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:13,800 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:13,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:45:14,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:45:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:45:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:14,903 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 7 treesize of output 5 [2022-11-20 11:45:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:14,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798296759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:14,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:14,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-11-20 11:45:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955141593] [2022-11-20 11:45:14,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:45:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:45:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:45:14,995 INFO L87 Difference]: Start difference. First operand 361 states and 398 transitions. Second operand has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:15,784 INFO L93 Difference]: Finished difference Result 620 states and 679 transitions. [2022-11-20 11:45:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:45:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 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 70 [2022-11-20 11:45:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:15,788 INFO L225 Difference]: With dead ends: 620 [2022-11-20 11:45:15,788 INFO L226 Difference]: Without dead ends: 620 [2022-11-20 11:45:15,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=422, Invalid=1740, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:45:15,789 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 643 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 465 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:45:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-11-20 11:45:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 523. [2022-11-20 11:45:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 521 states have (on average 1.1209213051823417) internal successors, (584), 522 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 584 transitions. [2022-11-20 11:45:15,803 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 584 transitions. Word has length 70 [2022-11-20 11:45:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:15,803 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 584 transitions. [2022-11-20 11:45:15,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 584 transitions. [2022-11-20 11:45:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 11:45:15,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:15,806 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:15,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:16,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:16,013 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:45:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1277501814, now seen corresponding path program 7 times [2022-11-20 11:45:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:16,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181670695] [2022-11-20 11:45:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:45:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181670695] [2022-11-20 11:45:17,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181670695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435045828] [2022-11-20 11:45:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:45:17,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:17,404 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:17,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:45:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:45:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:17,603 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 11:45:17,869 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 11:45:17,939 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 11:45:18,401 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:45:18,402 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 10 [2022-11-20 11:45:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:45:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:18,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:18,774 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 23 treesize of output 24 [2022-11-20 11:45:18,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:18,783 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 37 treesize of output 32 [2022-11-20 11:45:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:45:19,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435045828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:19,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 38 [2022-11-20 11:45:19,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626869917] [2022-11-20 11:45:19,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:19,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:45:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:45:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1293, Unknown=11, NotChecked=0, Total=1406 [2022-11-20 11:45:19,069 INFO L87 Difference]: Start difference. First operand 523 states and 584 transitions. Second operand has 38 states, 38 states have (on average 4.131578947368421) internal successors, (157), 38 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:21,284 INFO L93 Difference]: Finished difference Result 512 states and 570 transitions. [2022-11-20 11:45:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:45:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.131578947368421) internal successors, (157), 38 states have internal predecessors, (157), 0 states have call successors, (0), 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 74 [2022-11-20 11:45:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:21,287 INFO L225 Difference]: With dead ends: 512 [2022-11-20 11:45:21,287 INFO L226 Difference]: Without dead ends: 357 [2022-11-20 11:45:21,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=282, Invalid=2676, Unknown=12, NotChecked=0, Total=2970 [2022-11-20 11:45:21,288 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:21,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 454 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 648 Invalid, 0 Unknown, 139 Unchecked, 0.5s Time] [2022-11-20 11:45:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-20 11:45:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 354. [2022-11-20 11:45:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.1448863636363635) internal successors, (403), 353 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 403 transitions. [2022-11-20 11:45:21,297 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 403 transitions. Word has length 74 [2022-11-20 11:45:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:21,298 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 403 transitions. [2022-11-20 11:45:21,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.131578947368421) internal successors, (157), 38 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 403 transitions. [2022-11-20 11:45:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 11:45:21,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:21,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:21,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:21,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:21,507 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:45:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:21,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1176796164, now seen corresponding path program 8 times [2022-11-20 11:45:21,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:21,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720226429] [2022-11-20 11:45:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:21,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 20 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:23,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720226429] [2022-11-20 11:45:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720226429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219085606] [2022-11-20 11:45:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:45:23,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:23,010 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:23,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:45:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:45:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 11:45:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:23,469 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 11:45:24,210 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:45:24,210 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 10 [2022-11-20 11:45:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:45:24,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:24,686 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 15 treesize of output 13 [2022-11-20 11:45:24,689 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 11:45:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:45:24,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219085606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:24,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:24,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 16] total 46 [2022-11-20 11:45:24,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743952213] [2022-11-20 11:45:24,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:45:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:45:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:45:24,932 INFO L87 Difference]: Start difference. First operand 354 states and 403 transitions. Second operand has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:33,222 INFO L93 Difference]: Finished difference Result 726 states and 806 transitions. [2022-11-20 11:45:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 11:45:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 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 74 [2022-11-20 11:45:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:33,227 INFO L225 Difference]: With dead ends: 726 [2022-11-20 11:45:33,227 INFO L226 Difference]: Without dead ends: 720 [2022-11-20 11:45:33,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 3525 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=891, Invalid=12219, Unknown=0, NotChecked=0, Total=13110 [2022-11-20 11:45:33,229 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 583 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:33,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1388 Invalid, 3391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2453 Invalid, 0 Unknown, 916 Unchecked, 1.6s Time] [2022-11-20 11:45:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-20 11:45:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 545. [2022-11-20 11:45:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 543 states have (on average 1.134438305709024) internal successors, (616), 544 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 616 transitions. [2022-11-20 11:45:33,243 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 616 transitions. Word has length 74 [2022-11-20 11:45:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:33,244 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 616 transitions. [2022-11-20 11:45:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.608695652173913) internal successors, (166), 46 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 616 transitions. [2022-11-20 11:45:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 11:45:33,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:33,246 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:33,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:33,453 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:45:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -702791471, now seen corresponding path program 7 times [2022-11-20 11:45:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505004212] [2022-11-20 11:45:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 49 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:45:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:34,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505004212] [2022-11-20 11:45:34,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505004212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:34,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517995038] [2022-11-20 11:45:34,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:45:34,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:34,303 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:34,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:45:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 11:45:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:34,737 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 11:45:35,386 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:45:35,386 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 10 [2022-11-20 11:45:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:35,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:35,851 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 15 treesize of output 13 [2022-11-20 11:45:35,853 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 11:45:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517995038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:36,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:36,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 40 [2022-11-20 11:45:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901753119] [2022-11-20 11:45:36,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:45:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:45:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:45:36,042 INFO L87 Difference]: Start difference. First operand 545 states and 616 transitions. Second operand has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:40,811 INFO L93 Difference]: Finished difference Result 967 states and 1074 transitions. [2022-11-20 11:45:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 11:45:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 0 states have call successors, (0), 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 77 [2022-11-20 11:45:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:40,816 INFO L225 Difference]: With dead ends: 967 [2022-11-20 11:45:40,817 INFO L226 Difference]: Without dead ends: 956 [2022-11-20 11:45:40,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=685, Invalid=8245, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 11:45:40,818 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 747 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:40,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1366 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2376 Invalid, 0 Unknown, 151 Unchecked, 1.5s Time] [2022-11-20 11:45:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-20 11:45:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 574. [2022-11-20 11:45:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1293706293706294) internal successors, (646), 573 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 646 transitions. [2022-11-20 11:45:40,832 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 646 transitions. Word has length 77 [2022-11-20 11:45:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:40,832 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 646 transitions. [2022-11-20 11:45:40,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 646 transitions. [2022-11-20 11:45:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 11:45:40,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:40,834 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:40,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-20 11:45:41,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:41,040 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:45:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash 128229735, now seen corresponding path program 9 times [2022-11-20 11:45:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:41,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36642479] [2022-11-20 11:45:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36642479] [2022-11-20 11:45:43,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36642479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414790099] [2022-11-20 11:45:43,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:45:43,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:43,514 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:43,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:45:43,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:45:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 11:45:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:43,738 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 11:45:44,322 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 11:45:44,392 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 14 treesize of output 16 [2022-11-20 11:45:45,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-11-20 11:45:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 75 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:45:45,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:46,204 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1202 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1202 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0))))) is different from false [2022-11-20 11:45:46,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:46,213 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 26 treesize of output 27 [2022-11-20 11:45:46,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:46,222 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 44 treesize of output 39 [2022-11-20 11:45:46,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:46,232 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 32 treesize of output 32 [2022-11-20 11:45:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 75 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:45:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414790099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:46,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 20] total 53 [2022-11-20 11:45:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666649774] [2022-11-20 11:45:46,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:46,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:45:46,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:45:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2510, Unknown=1, NotChecked=100, Total=2756 [2022-11-20 11:45:46,797 INFO L87 Difference]: Start difference. First operand 574 states and 646 transitions. Second operand has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:58,553 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 105 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:46:05,222 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 65 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:46:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:07,686 INFO L93 Difference]: Finished difference Result 1097 states and 1234 transitions. [2022-11-20 11:46:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:46:07,687 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 0 states have call successors, (0), 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 78 [2022-11-20 11:46:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:07,690 INFO L225 Difference]: With dead ends: 1097 [2022-11-20 11:46:07,691 INFO L226 Difference]: Without dead ends: 1097 [2022-11-20 11:46:07,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=485, Invalid=6490, Unknown=1, NotChecked=164, Total=7140 [2022-11-20 11:46:07,692 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 424 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:07,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 905 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1754 Invalid, 0 Unknown, 196 Unchecked, 1.8s Time] [2022-11-20 11:46:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-11-20 11:46:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 853. [2022-11-20 11:46:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 851 states have (on average 1.1257344300822563) internal successors, (958), 852 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 958 transitions. [2022-11-20 11:46:07,722 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 958 transitions. Word has length 78 [2022-11-20 11:46:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 958 transitions. [2022-11-20 11:46:07,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7358490566037736) internal successors, (198), 53 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 958 transitions. [2022-11-20 11:46:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 11:46:07,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:07,727 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:07,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:07,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-20 11:46:07,934 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:46:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:07,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1781498856, now seen corresponding path program 10 times [2022-11-20 11:46:07,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:07,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859594850] [2022-11-20 11:46:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:07,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:46:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:08,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859594850] [2022-11-20 11:46:08,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859594850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:08,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317634136] [2022-11-20 11:46:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:46:08,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:08,812 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:08,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:46:09,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:46:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 11:46:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:09,157 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 11:46:09,245 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 11:46:09,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 11:46:27,679 WARN L233 SmtUtils]: Spent 11.52s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:46:40,796 INFO L321 Elim1Store]: treesize reduction 64, result has 78.5 percent of original size [2022-11-20 11:46:40,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 84 treesize of output 264 [2022-11-20 11:46:41,227 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-20 11:46:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:46:42,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:47,786 INFO L321 Elim1Store]: treesize reduction 189, result has 23.5 percent of original size [2022-11-20 11:46:47,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 696 treesize of output 638 [2022-11-20 11:46:47,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:46:47,846 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 490 treesize of output 478 [2022-11-20 11:46:47,871 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 11:46:47,915 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 149 treesize of output 139 [2022-11-20 11:46:48,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:46:48,068 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 372 treesize of output 366 [2022-11-20 11:46:48,514 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 308 treesize of output 298 [2022-11-20 11:46:48,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:46:48,808 INFO L321 Elim1Store]: treesize reduction 10, result has 92.5 percent of original size [2022-11-20 11:46:48,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 212 treesize of output 263 [2022-11-20 11:46:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:46:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317634136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:51,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:51,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 69 [2022-11-20 11:46:51,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268280169] [2022-11-20 11:46:51,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-20 11:46:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-20 11:46:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=4380, Unknown=4, NotChecked=0, Total=4692 [2022-11-20 11:46:51,847 INFO L87 Difference]: Start difference. First operand 853 states and 958 transitions. Second operand has 69 states, 69 states have (on average 2.550724637681159) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:20,181 WARN L233 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:47:57,911 WARN L233 SmtUtils]: Spent 14.08s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:48:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:20,899 INFO L93 Difference]: Finished difference Result 1429 states and 1571 transitions. [2022-11-20 11:48:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-20 11:48:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.550724637681159) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 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 78 [2022-11-20 11:48:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:20,901 INFO L225 Difference]: With dead ends: 1429 [2022-11-20 11:48:20,901 INFO L226 Difference]: Without dead ends: 1348 [2022-11-20 11:48:20,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9955 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=3277, Invalid=33775, Unknown=4, NotChecked=0, Total=37056 [2022-11-20 11:48:20,905 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:20,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 546 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 728 Unchecked, 0.1s Time] [2022-11-20 11:48:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-11-20 11:48:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1195. [2022-11-20 11:48:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1193 states have (on average 1.1089689857502096) internal successors, (1323), 1194 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1323 transitions. [2022-11-20 11:48:20,925 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1323 transitions. Word has length 78 [2022-11-20 11:48:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:20,925 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 1323 transitions. [2022-11-20 11:48:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.550724637681159) internal successors, (176), 69 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1323 transitions. [2022-11-20 11:48:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 11:48:20,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:20,928 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:20,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 11:48:21,135 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:48:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 515705984, now seen corresponding path program 11 times [2022-11-20 11:48:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133376035] [2022-11-20 11:48:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 80 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:48:22,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133376035] [2022-11-20 11:48:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133376035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268078208] [2022-11-20 11:48:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:48:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:22,151 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:22,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:48:22,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:48:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 11:48:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:22,613 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 11:48:23,440 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:48:23,440 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 10 [2022-11-20 11:48:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 10 proven. 93 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:48:23,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:23,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 11:48:23,887 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 11:48:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 10 proven. 93 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:48:24,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268078208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:24,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:24,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 41 [2022-11-20 11:48:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985244940] [2022-11-20 11:48:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:48:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:24,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:48:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1537, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:48:24,110 INFO L87 Difference]: Start difference. First operand 1195 states and 1323 transitions. Second operand has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:28,413 INFO L93 Difference]: Finished difference Result 1228 states and 1338 transitions. [2022-11-20 11:48:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 11:48:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 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 81 [2022-11-20 11:48:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:28,416 INFO L225 Difference]: With dead ends: 1228 [2022-11-20 11:48:28,416 INFO L226 Difference]: Without dead ends: 1127 [2022-11-20 11:48:28,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=630, Invalid=9072, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 11:48:28,418 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 396 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:28,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1372 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1738 Invalid, 0 Unknown, 823 Unchecked, 1.1s Time] [2022-11-20 11:48:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-20 11:48:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1010. [2022-11-20 11:48:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1008 states have (on average 1.0992063492063493) internal successors, (1108), 1009 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1108 transitions. [2022-11-20 11:48:28,437 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1108 transitions. Word has length 81 [2022-11-20 11:48:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:28,438 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1108 transitions. [2022-11-20 11:48:28,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1108 transitions. [2022-11-20 11:48:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 11:48:28,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:28,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:28,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 11:48:28,647 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:48:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 87879678, now seen corresponding path program 12 times [2022-11-20 11:48:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:28,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937313543] [2022-11-20 11:48:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:29,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937313543] [2022-11-20 11:48:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937313543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687959510] [2022-11-20 11:48:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:48:29,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:29,184 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:29,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:48:29,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:48:29,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:48:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:29,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:30,318 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 7 treesize of output 5 [2022-11-20 11:48:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:30,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687959510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:30,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-11-20 11:48:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105123560] [2022-11-20 11:48:30,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:30,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:48:30,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:48:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:48:30,468 INFO L87 Difference]: Start difference. First operand 1010 states and 1108 transitions. Second operand has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:32,179 INFO L93 Difference]: Finished difference Result 1262 states and 1383 transitions. [2022-11-20 11:48:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:48:32,179 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 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 82 [2022-11-20 11:48:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:32,182 INFO L225 Difference]: With dead ends: 1262 [2022-11-20 11:48:32,182 INFO L226 Difference]: Without dead ends: 1262 [2022-11-20 11:48:32,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=774, Invalid=2648, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:48:32,183 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 729 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:32,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 616 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:48:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-11-20 11:48:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1010. [2022-11-20 11:48:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1008 states have (on average 1.0972222222222223) internal successors, (1106), 1009 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1106 transitions. [2022-11-20 11:48:32,203 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1106 transitions. Word has length 82 [2022-11-20 11:48:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:32,203 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1106 transitions. [2022-11-20 11:48:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1106 transitions. [2022-11-20 11:48:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-20 11:48:32,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:32,207 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:32,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:32,414 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:48:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -725839209, now seen corresponding path program 8 times [2022-11-20 11:48:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5717023] [2022-11-20 11:48:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:33,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:33,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5717023] [2022-11-20 11:48:33,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5717023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:33,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730264158] [2022-11-20 11:48:33,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:33,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:33,059 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:33,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:48:33,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:48:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 11:48:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:34,148 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 5 treesize of output 3 [2022-11-20 11:48:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:34,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730264158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:34,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:34,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 11:48:34,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405220928] [2022-11-20 11:48:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:34,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:48:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:48:34,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:48:34,271 INFO L87 Difference]: Start difference. First operand 1010 states and 1106 transitions. Second operand has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:35,475 INFO L93 Difference]: Finished difference Result 1623 states and 1778 transitions. [2022-11-20 11:48:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:48:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-20 11:48:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:35,479 INFO L225 Difference]: With dead ends: 1623 [2022-11-20 11:48:35,480 INFO L226 Difference]: Without dead ends: 1623 [2022-11-20 11:48:35,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=458, Invalid=1894, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:48:35,481 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 574 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 784 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:48:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-20 11:48:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1460. [2022-11-20 11:48:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1458 states have (on average 1.107681755829904) internal successors, (1615), 1459 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1615 transitions. [2022-11-20 11:48:35,503 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1615 transitions. Word has length 85 [2022-11-20 11:48:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:35,503 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 1615 transitions. [2022-11-20 11:48:35,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.371428571428571) internal successors, (153), 36 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1615 transitions. [2022-11-20 11:48:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 11:48:35,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:35,507 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:35,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:35,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 11:48:35,713 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:48:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1828756544, now seen corresponding path program 13 times [2022-11-20 11:48:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:35,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900367300] [2022-11-20 11:48:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:35,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 128 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:48:36,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900367300] [2022-11-20 11:48:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900367300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964541017] [2022-11-20 11:48:36,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:48:36,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:36,112 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:36,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:48:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 11:48:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:48:36,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:37,322 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 5 treesize of output 3 [2022-11-20 11:48:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:48:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964541017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:37,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:37,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 30 [2022-11-20 11:48:37,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330527508] [2022-11-20 11:48:37,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:37,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:48:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:37,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:48:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:48:37,442 INFO L87 Difference]: Start difference. First operand 1460 states and 1615 transitions. Second operand has 31 states, 30 states have (on average 5.833333333333333) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:38,974 INFO L93 Difference]: Finished difference Result 2362 states and 2647 transitions. [2022-11-20 11:48:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:48:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.833333333333333) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 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 89 [2022-11-20 11:48:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:38,979 INFO L225 Difference]: With dead ends: 2362 [2022-11-20 11:48:38,979 INFO L226 Difference]: Without dead ends: 2362 [2022-11-20 11:48:38,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=574, Invalid=2078, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:48:38,980 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 829 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:38,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 554 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:48:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-11-20 11:48:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1768. [2022-11-20 11:48:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1766 states have (on average 1.1160815402038504) internal successors, (1971), 1767 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 1971 transitions. [2022-11-20 11:48:39,014 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 1971 transitions. Word has length 89 [2022-11-20 11:48:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:39,015 INFO L495 AbstractCegarLoop]: Abstraction has 1768 states and 1971 transitions. [2022-11-20 11:48:39,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.833333333333333) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 1971 transitions. [2022-11-20 11:48:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 11:48:39,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:39,018 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:39,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:39,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 11:48:39,225 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:48:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -94247698, now seen corresponding path program 14 times [2022-11-20 11:48:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:39,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936039334] [2022-11-20 11:48:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:48:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936039334] [2022-11-20 11:48:40,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936039334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917437759] [2022-11-20 11:48:40,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:40,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:40,715 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:40,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 11:48:40,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:48:40,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:48:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:40,976 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:48:40,977 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 11:48:41,768 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 16 treesize of output 12 [2022-11-20 11:49:02,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:49:02,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2022-11-20 11:49:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 56 proven. 67 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:49:02,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:03,846 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 11:49:03,851 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 11:49:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 49 proven. 74 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:49:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917437759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:05,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:05,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 60 [2022-11-20 11:49:05,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094825175] [2022-11-20 11:49:05,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:49:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:49:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3280, Unknown=14, NotChecked=0, Total=3540 [2022-11-20 11:49:05,188 INFO L87 Difference]: Start difference. First operand 1768 states and 1971 transitions. Second operand has 60 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 60 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:53,878 INFO L93 Difference]: Finished difference Result 2063 states and 2282 transitions. [2022-11-20 11:49:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 11:49:53,879 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 60 states have internal predecessors, (217), 0 states have call successors, (0), 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 89 [2022-11-20 11:49:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:53,887 INFO L225 Difference]: With dead ends: 2063 [2022-11-20 11:49:53,887 INFO L226 Difference]: Without dead ends: 2054 [2022-11-20 11:49:53,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3773 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=1361, Invalid=14375, Unknown=14, NotChecked=0, Total=15750 [2022-11-20 11:49:53,888 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 375 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:53,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1576 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1078 Invalid, 0 Unknown, 601 Unchecked, 0.9s Time] [2022-11-20 11:49:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-11-20 11:49:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1898. [2022-11-20 11:49:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1896 states have (on average 1.1139240506329113) internal successors, (2112), 1897 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2112 transitions. [2022-11-20 11:49:53,913 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2112 transitions. Word has length 89 [2022-11-20 11:49:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:53,913 INFO L495 AbstractCegarLoop]: Abstraction has 1898 states and 2112 transitions. [2022-11-20 11:49:53,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 60 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2112 transitions. [2022-11-20 11:49:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 11:49:53,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:53,917 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:53,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:54,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:54,127 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:49:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1431482111, now seen corresponding path program 15 times [2022-11-20 11:49:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:54,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930004303] [2022-11-20 11:49:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 30 proven. 137 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:49:56,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:56,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930004303] [2022-11-20 11:49:56,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930004303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58070597] [2022-11-20 11:49:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:49:56,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:56,876 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:56,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 11:49:57,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:49:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 11:49:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:57,196 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:49:57,196 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 11:49:58,124 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 11:49:58,313 INFO L321 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2022-11-20 11:49:58,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-20 11:50:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:50:02,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:06,494 INFO L321 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2022-11-20 11:50:06,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 152 [2022-11-20 11:50:06,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:50:06,525 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 148 treesize of output 140 [2022-11-20 11:50:06,543 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:50:06,543 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 108 treesize of output 99 [2022-11-20 11:50:06,650 INFO L321 Elim1Store]: treesize reduction 5, result has 90.6 percent of original size [2022-11-20 11:50:06,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 108 [2022-11-20 11:50:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 2 proven. 154 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:50:09,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58070597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:09,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:09,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 27] total 77 [2022-11-20 11:50:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547293963] [2022-11-20 11:50:09,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 11:50:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 11:50:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=5536, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:50:09,816 INFO L87 Difference]: Start difference. First operand 1898 states and 2112 transitions. Second operand has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 77 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:50:16,635 INFO L93 Difference]: Finished difference Result 2087 states and 2315 transitions. [2022-11-20 11:50:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:50:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 77 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 11:50:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:50:16,643 INFO L225 Difference]: With dead ends: 2087 [2022-11-20 11:50:16,644 INFO L226 Difference]: Without dead ends: 2087 [2022-11-20 11:50:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=657, Invalid=10685, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:50:16,645 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:50:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 899 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1004 Invalid, 0 Unknown, 460 Unchecked, 1.2s Time] [2022-11-20 11:50:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2022-11-20 11:50:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1908. [2022-11-20 11:50:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1906 states have (on average 1.1196222455403988) internal successors, (2134), 1907 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2134 transitions. [2022-11-20 11:50:16,666 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2134 transitions. Word has length 92 [2022-11-20 11:50:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:50:16,667 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2134 transitions. [2022-11-20 11:50:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 77 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2134 transitions. [2022-11-20 11:50:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 11:50:16,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:50:16,671 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:16,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 11:50:16,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-20 11:50:16,878 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:50:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash -137707159, now seen corresponding path program 9 times [2022-11-20 11:50:16,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:16,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309269567] [2022-11-20 11:50:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:16,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 61 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:50:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309269567] [2022-11-20 11:50:17,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309269567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805188494] [2022-11-20 11:50:17,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:50:17,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:17,724 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 11:50:18,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 11:50:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:50:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-20 11:50:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:18,071 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 11:50:18,850 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 11:50:18,922 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 11:50:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:50:20,089 INFO L321 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2022-11-20 11:50:20,089 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 32 treesize of output 28 [2022-11-20 11:50:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:50:20,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:21,418 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (v_ArrVal_1594 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1594))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)))))) is different from false [2022-11-20 11:50:21,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:50:21,427 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 11:50:21,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:50:21,454 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 111 treesize of output 116 [2022-11-20 11:50:21,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:50:21,468 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 68 treesize of output 64 [2022-11-20 11:50:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 98 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 11:50:22,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805188494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:22,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:22,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 23] total 62 [2022-11-20 11:50:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672194328] [2022-11-20 11:50:22,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:50:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:50:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3471, Unknown=1, NotChecked=118, Total=3782 [2022-11-20 11:50:22,298 INFO L87 Difference]: Start difference. First operand 1908 states and 2134 transitions. Second operand has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:50:33,460 INFO L93 Difference]: Finished difference Result 2906 states and 3259 transitions. [2022-11-20 11:50:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:50:33,460 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 11:50:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:50:33,465 INFO L225 Difference]: With dead ends: 2906 [2022-11-20 11:50:33,465 INFO L226 Difference]: Without dead ends: 2906 [2022-11-20 11:50:33,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=649, Invalid=9656, Unknown=1, NotChecked=200, Total=10506 [2022-11-20 11:50:33,466 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 369 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:50:33,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 2021 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1797 Invalid, 0 Unknown, 720 Unchecked, 1.4s Time] [2022-11-20 11:50:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-20 11:50:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 1936. [2022-11-20 11:50:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1934 states have (on average 1.1194415718717683) internal successors, (2165), 1935 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2165 transitions. [2022-11-20 11:50:33,494 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2165 transitions. Word has length 92 [2022-11-20 11:50:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:50:33,494 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2165 transitions. [2022-11-20 11:50:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2165 transitions. [2022-11-20 11:50:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:50:33,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:50:33,498 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:33,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:50:33,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:33,705 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:50:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -153180781, now seen corresponding path program 16 times [2022-11-20 11:50:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516619842] [2022-11-20 11:50:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:50:35,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:35,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516619842] [2022-11-20 11:50:35,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516619842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:35,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222737639] [2022-11-20 11:50:35,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:50:35,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:35,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:35,480 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:35,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 11:50:35,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:50:35,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:50:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-20 11:50:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:35,805 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 11:50:35,898 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-20 11:50:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 11:50:41,702 INFO L321 Elim1Store]: treesize reduction 65, result has 72.8 percent of original size [2022-11-20 11:50:41,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 86 treesize of output 205 [2022-11-20 11:50:41,817 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-20 11:50:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 39 proven. 128 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:50:42,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:49,787 INFO L321 Elim1Store]: treesize reduction 133, result has 31.1 percent of original size [2022-11-20 11:50:49,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 520 treesize of output 452 [2022-11-20 11:50:49,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:50:49,843 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 306 treesize of output 284 [2022-11-20 11:50:49,860 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 11:50:49,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:50:49,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:50:49,904 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 11:50:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 265 treesize of output 242 [2022-11-20 11:50:50,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:50:50,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:50:50,118 INFO L321 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2022-11-20 11:50:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 132 treesize of output 169 [2022-11-20 11:50:50,497 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-20 11:50:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:50:50,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222737639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:50,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:50,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 28] total 74 [2022-11-20 11:50:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346462472] [2022-11-20 11:50:50,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-20 11:50:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-20 11:50:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=5128, Unknown=1, NotChecked=0, Total=5550 [2022-11-20 11:50:50,662 INFO L87 Difference]: Start difference. First operand 1936 states and 2165 transitions. Second operand has 75 states, 74 states have (on average 3.189189189189189) internal successors, (236), 75 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:12,628 INFO L93 Difference]: Finished difference Result 3571 states and 3944 transitions. [2022-11-20 11:55:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-11-20 11:55:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.189189189189189) internal successors, (236), 75 states have internal predecessors, (236), 0 states have call successors, (0), 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 96 [2022-11-20 11:55:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:12,637 INFO L225 Difference]: With dead ends: 3571 [2022-11-20 11:55:12,637 INFO L226 Difference]: Without dead ends: 3421 [2022-11-20 11:55:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 162 SyntacticMatches, 18 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22681 ImplicationChecksByTransitivity, 270.8s TimeCoverageRelationStatistics Valid=8143, Invalid=57637, Unknown=12, NotChecked=0, Total=65792 [2022-11-20 11:55:12,642 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1080 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 5838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4289 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:12,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1021 Invalid, 5838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1524 Invalid, 0 Unknown, 4289 Unchecked, 1.7s Time] [2022-11-20 11:55:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3421 states. [2022-11-20 11:55:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3421 to 2742. [2022-11-20 11:55:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2740 states have (on average 1.1178832116788322) internal successors, (3063), 2741 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 3063 transitions. [2022-11-20 11:55:12,669 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 3063 transitions. Word has length 96 [2022-11-20 11:55:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:12,670 INFO L495 AbstractCegarLoop]: Abstraction has 2742 states and 3063 transitions. [2022-11-20 11:55:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.189189189189189) internal successors, (236), 75 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 3063 transitions. [2022-11-20 11:55:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:55:12,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:12,673 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:12,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:12,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:12,887 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:55:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1029795899, now seen corresponding path program 17 times [2022-11-20 11:55:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:12,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654221944] [2022-11-20 11:55:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:12,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:55:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654221944] [2022-11-20 11:55:13,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654221944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645551890] [2022-11-20 11:55:13,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:55:13,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:13,995 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 11:55:14,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 11:55:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 11:55:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:14,666 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 11:55:14,752 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:55:14,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-20 11:55:14,761 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 8 treesize of output 3 [2022-11-20 11:55:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:55:16,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:55:16,617 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:55:16,617 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 6 case distinctions, treesize of input 29 treesize of output 18 [2022-11-20 11:55:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:55:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:17,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:17,975 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 51 treesize of output 40 [2022-11-20 11:55:17,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:17,992 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 70 treesize of output 67 [2022-11-20 11:55:18,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:18,012 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 39 treesize of output 41 [2022-11-20 11:55:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:55:18,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645551890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:18,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:18,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 55 [2022-11-20 11:55:18,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082247185] [2022-11-20 11:55:18,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:18,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:55:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:55:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2809, Unknown=5, NotChecked=0, Total=2970 [2022-11-20 11:55:18,738 INFO L87 Difference]: Start difference. First operand 2742 states and 3063 transitions. Second operand has 55 states, 55 states have (on average 4.163636363636364) internal successors, (229), 55 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:23,330 INFO L93 Difference]: Finished difference Result 2975 states and 3303 transitions. [2022-11-20 11:55:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 11:55:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.163636363636364) internal successors, (229), 55 states have internal predecessors, (229), 0 states have call successors, (0), 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 96 [2022-11-20 11:55:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:23,335 INFO L225 Difference]: With dead ends: 2975 [2022-11-20 11:55:23,336 INFO L226 Difference]: Without dead ends: 2939 [2022-11-20 11:55:23,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=459, Invalid=8848, Unknown=5, NotChecked=0, Total=9312 [2022-11-20 11:55:23,337 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:23,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1085 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 680 Invalid, 0 Unknown, 205 Unchecked, 0.6s Time] [2022-11-20 11:55:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-11-20 11:55:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2863. [2022-11-20 11:55:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2861 states have (on average 1.1142957008039147) internal successors, (3188), 2862 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3188 transitions. [2022-11-20 11:55:23,364 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3188 transitions. Word has length 96 [2022-11-20 11:55:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:23,364 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 3188 transitions. [2022-11-20 11:55:23,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.163636363636364) internal successors, (229), 55 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3188 transitions. [2022-11-20 11:55:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:55:23,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:23,368 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:23,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:23,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-20 11:55:23,574 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:55:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1024235853, now seen corresponding path program 18 times [2022-11-20 11:55:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:23,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198013389] [2022-11-20 11:55:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:55:24,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:24,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198013389] [2022-11-20 11:55:24,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198013389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:24,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250652422] [2022-11-20 11:55:24,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:55:24,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:24,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:24,756 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:24,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 11:55:25,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:55:25,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 11:55:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:25,030 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 11:55:25,439 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 11:55:25,510 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 11:55:26,782 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-11-20 11:55:26,782 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 33 treesize of output 30 [2022-11-20 11:55:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 60 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:55:26,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:28,078 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (v_ArrVal_1727 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1727))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0))))) is different from false [2022-11-20 11:55:28,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:28,087 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 11:55:28,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:28,113 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 111 treesize of output 116 [2022-11-20 11:55:28,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:28,129 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 68 treesize of output 64 [2022-11-20 11:55:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 60 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 11:55:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250652422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:28,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 50 [2022-11-20 11:55:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802058986] [2022-11-20 11:55:28,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:55:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:55:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2214, Unknown=1, NotChecked=94, Total=2450 [2022-11-20 11:55:28,758 INFO L87 Difference]: Start difference. First operand 2863 states and 3188 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:33,053 INFO L93 Difference]: Finished difference Result 2721 states and 3012 transitions. [2022-11-20 11:55:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:55:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 96 [2022-11-20 11:55:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:33,071 INFO L225 Difference]: With dead ends: 2721 [2022-11-20 11:55:33,071 INFO L226 Difference]: Without dead ends: 2721 [2022-11-20 11:55:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 6 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=299, Invalid=4534, Unknown=1, NotChecked=136, Total=4970 [2022-11-20 11:55:33,072 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 752 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 424 Invalid, 0 Unknown, 257 Unchecked, 0.4s Time] [2022-11-20 11:55:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-20 11:55:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2714. [2022-11-20 11:55:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2712 states have (on average 1.108038348082596) internal successors, (3005), 2713 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3005 transitions. [2022-11-20 11:55:33,131 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3005 transitions. Word has length 96 [2022-11-20 11:55:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:33,131 INFO L495 AbstractCegarLoop]: Abstraction has 2714 states and 3005 transitions. [2022-11-20 11:55:33,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3005 transitions. [2022-11-20 11:55:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:55:33,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:33,135 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:33,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:33,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:33,342 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:55:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash -193240099, now seen corresponding path program 19 times [2022-11-20 11:55:33,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:33,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109734062] [2022-11-20 11:55:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:33,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 151 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:55:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109734062] [2022-11-20 11:55:33,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109734062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897595665] [2022-11-20 11:55:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:55:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:33,843 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:33,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 11:55:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 11:55:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:55:34,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:35,093 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 5 treesize of output 3 [2022-11-20 11:55:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:55:35,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897595665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:35,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:35,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 29 [2022-11-20 11:55:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153106863] [2022-11-20 11:55:35,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:55:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:55:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:55:35,228 INFO L87 Difference]: Start difference. First operand 2714 states and 3005 transitions. Second operand has 30 states, 29 states have (on average 5.620689655172414) internal successors, (163), 30 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:36,777 INFO L93 Difference]: Finished difference Result 3311 states and 3668 transitions. [2022-11-20 11:55:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:55:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.620689655172414) internal successors, (163), 30 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-20 11:55:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:36,781 INFO L225 Difference]: With dead ends: 3311 [2022-11-20 11:55:36,781 INFO L226 Difference]: Without dead ends: 3311 [2022-11-20 11:55:36,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=2057, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:55:36,782 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 681 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:36,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 518 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:55:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2022-11-20 11:55:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2645. [2022-11-20 11:55:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2643 states have (on average 1.1074536511539916) internal successors, (2927), 2644 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 2927 transitions. [2022-11-20 11:55:36,816 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 2927 transitions. Word has length 96 [2022-11-20 11:55:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:36,816 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 2927 transitions. [2022-11-20 11:55:36,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.620689655172414) internal successors, (163), 30 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 2927 transitions. [2022-11-20 11:55:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:55:36,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:36,819 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:36,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:37,026 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:55:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1480329382, now seen corresponding path program 20 times [2022-11-20 11:55:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:37,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66149760] [2022-11-20 11:55:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:55:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66149760] [2022-11-20 11:55:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66149760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506508419] [2022-11-20 11:55:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:55:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:38,131 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:38,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 11:55:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:55:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:55:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:38,401 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:55:38,402 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 11:55:39,187 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 16 treesize of output 12 [2022-11-20 11:56:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:56:05,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2022-11-20 11:56:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:56:05,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:06,881 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 11:56:06,885 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 11:56:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 51 proven. 105 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:56:08,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506508419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:08,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:08,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 55 [2022-11-20 11:56:08,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44224786] [2022-11-20 11:56:08,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:56:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:56:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2724, Unknown=16, NotChecked=0, Total=2970 [2022-11-20 11:56:08,223 INFO L87 Difference]: Start difference. First operand 2645 states and 2927 transitions. Second operand has 55 states, 55 states have (on average 4.0) internal successors, (220), 55 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 11:56:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:32,921 INFO L93 Difference]: Finished difference Result 2937 states and 3207 transitions. [2022-11-20 11:56:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 11:56:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.0) internal successors, (220), 55 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) Word has length 96 [2022-11-20 11:56:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:32,926 INFO L225 Difference]: With dead ends: 2937 [2022-11-20 11:56:32,926 INFO L226 Difference]: Without dead ends: 2916 [2022-11-20 11:56:32,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=1480, Invalid=13510, Unknown=16, NotChecked=0, Total=15006 [2022-11-20 11:56:32,927 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 683 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:32,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1621 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 795 Invalid, 0 Unknown, 438 Unchecked, 0.7s Time] [2022-11-20 11:56:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2022-11-20 11:56:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2555. [2022-11-20 11:56:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2555 states, 2553 states have (on average 1.0990990990990992) internal successors, (2806), 2554 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:56:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 2806 transitions. [2022-11-20 11:56:32,957 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 2806 transitions. Word has length 96 [2022-11-20 11:56:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:32,957 INFO L495 AbstractCegarLoop]: Abstraction has 2555 states and 2806 transitions. [2022-11-20 11:56:32,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.0) internal successors, (220), 55 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 11:56:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 2806 transitions. [2022-11-20 11:56:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:56:32,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:32,960 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:32,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-20 11:56:33,168 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-20 11:56:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -176265466, now seen corresponding path program 10 times [2022-11-20 11:56:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:33,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797962883] [2022-11-20 11:56:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797962883] [2022-11-20 11:56:35,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797962883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640617224] [2022-11-20 11:56:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:56:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:35,374 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_124c6569-a8a4-49b1-93cf-dec7e0c29328/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 11:56:35,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:56:35,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 11:56:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:36,132 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