./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.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_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/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_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/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_d9abce74-1d9e-473a-8c48-24937803eb81/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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- 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 11:03:40,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:03:40,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:03:40,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:03:40,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:03:40,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:03:40,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:03:40,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:03:40,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:03:40,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:03:40,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:03:40,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:03:40,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:03:40,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:03:40,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:03:40,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:03:40,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:03:40,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:03:40,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:03:40,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:03:40,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:03:40,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:03:40,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:03:40,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:03:40,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:03:40,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:03:40,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:03:40,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:03:40,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:03:40,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:03:40,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:03:40,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:03:40,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:03:40,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:03:40,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:03:40,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:03:40,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:03:40,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:03:40,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:03:40,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:03:40,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:03:40,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:03:40,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:03:40,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:03:40,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:03:40,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:03:40,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:03:40,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:03:40,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:03:40,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:03:40,206 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:03:40,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:03:40,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:03:40,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:03:40,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:03:40,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:03:40,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:03:40,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:03:40,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:03:40,210 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:03:40,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:03:40,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:03:40,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:03:40,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:03:40,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:03:40,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:03:40,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:03:40,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:03:40,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:03:40,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:03:40,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:03:40,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:03:40,214 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_d9abce74-1d9e-473a-8c48-24937803eb81/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-20 11:03:40,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:03:40,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:03:40,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:03:40,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:03:40,582 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:03:40,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-20 11:03:43,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:03:44,029 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:03:44,030 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-20 11:03:44,064 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/data/7e398aa8d/634f2c5e9a40438eb2e9033f84782316/FLAG912cdd086 [2022-11-20 11:03:44,089 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/data/7e398aa8d/634f2c5e9a40438eb2e9033f84782316 [2022-11-20 11:03:44,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:03:44,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:03:44,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:03:44,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:03:44,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:03:44,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:44,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e2b38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44, skipping insertion in model container [2022-11-20 11:03:44,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:44,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:03:44,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:03:44,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-20 11:03:44,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:03:44,806 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:03:44,843 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-20 11:03:44,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:03:44,932 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:03:44,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44 WrapperNode [2022-11-20 11:03:44,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:03:44,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:03:44,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:03:44,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:03:44,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:44,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:44,997 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-20 11:03:44,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:03:44,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:03:44,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:03:44,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:03:45,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:03:45,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:03:45,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:03:45,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:03:45,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (1/1) ... [2022-11-20 11:03:45,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:03:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:45,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:03:45,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:03:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:03:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:03:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-20 11:03:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-20 11:03:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:03:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:03:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-20 11:03:45,135 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-20 11:03:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:03:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:03:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:03:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:03:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:03:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:03:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:03:45,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:03:45,140 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:03:45,370 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:03:45,373 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:03:46,001 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:03:46,012 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:03:46,012 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 11:03:46,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:03:46 BoogieIcfgContainer [2022-11-20 11:03:46,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:03:46,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:03:46,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:03:46,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:03:46,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:03:44" (1/3) ... [2022-11-20 11:03:46,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589c4133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:03:46, skipping insertion in model container [2022-11-20 11:03:46,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:44" (2/3) ... [2022-11-20 11:03:46,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589c4133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:03:46, skipping insertion in model container [2022-11-20 11:03:46,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:03:46" (3/3) ... [2022-11-20 11:03:46,041 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-20 11:03:46,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:03:46,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-20 11:03:46,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:03:46,283 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:03:46,340 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:03:46,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-20 11:03:46,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-20 11:03:46,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-20 11:03:46,744 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-20 11:03:46,744 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-20 11:03:46,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2462 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-20 11:03:46,785 INFO L119 LiptonReduction]: Number of co-enabled transitions 27012 [2022-11-20 11:04:13,771 INFO L134 LiptonReduction]: Checked pairs total: 63208 [2022-11-20 11:04:13,771 INFO L136 LiptonReduction]: Total number of compositions: 261 [2022-11-20 11:04:13,781 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 101 places, 114 transitions, 250 flow [2022-11-20 11:04:14,449 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:14,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:04:14,493 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;@390442e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:04:14,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-20 11:04:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:04:14,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:14,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:04:14,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:04:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 36149, now seen corresponding path program 1 times [2022-11-20 11:04:14,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:14,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469068776] [2022-11-20 11:04:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:14,824 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 11:04:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469068776] [2022-11-20 11:04:14,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469068776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:14,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:14,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:04:14,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654998638] [2022-11-20 11:04:14,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:14,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:04:14,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:04:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:04:14,881 INFO L87 Difference]: Start difference. First operand has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:15,337 INFO L93 Difference]: Finished difference Result 17379 states and 49559 transitions. [2022-11-20 11:04:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:04:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 11:04:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:15,696 INFO L225 Difference]: With dead ends: 17379 [2022-11-20 11:04:15,711 INFO L226 Difference]: Without dead ends: 17343 [2022-11-20 11:04:15,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:04:15,722 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:15,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:04:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2022-11-20 11:04:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 17343. [2022-11-20 11:04:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17343 states, 14458 states have (on average 3.4211509199059345) internal successors, (49463), 17342 states have internal predecessors, (49463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17343 states to 17343 states and 49463 transitions. [2022-11-20 11:04:16,860 INFO L78 Accepts]: Start accepts. Automaton has 17343 states and 49463 transitions. Word has length 2 [2022-11-20 11:04:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:16,861 INFO L495 AbstractCegarLoop]: Abstraction has 17343 states and 49463 transitions. [2022-11-20 11:04:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17343 states and 49463 transitions. [2022-11-20 11:04:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:04:16,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:16,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:04:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:04:16,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:04:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash 36145, now seen corresponding path program 1 times [2022-11-20 11:04:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:16,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269142367] [2022-11-20 11:04:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:17,245 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 11:04:17,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269142367] [2022-11-20 11:04:17,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269142367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:17,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:17,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:04:17,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412384601] [2022-11-20 11:04:17,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:17,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:04:17,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:17,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:04:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:04:17,250 INFO L87 Difference]: Start difference. First operand 17343 states and 49463 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:17,999 INFO L93 Difference]: Finished difference Result 17344 states and 49464 transitions. [2022-11-20 11:04:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:04:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 11:04:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:18,190 INFO L225 Difference]: With dead ends: 17344 [2022-11-20 11:04:18,190 INFO L226 Difference]: Without dead ends: 17344 [2022-11-20 11:04:18,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:04:18,201 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:18,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:04:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17344 states. [2022-11-20 11:04:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17344 to 17344. [2022-11-20 11:04:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17344 states, 14459 states have (on average 3.420983470502801) internal successors, (49464), 17343 states have internal predecessors, (49464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17344 states to 17344 states and 49464 transitions. [2022-11-20 11:04:19,145 INFO L78 Accepts]: Start accepts. Automaton has 17344 states and 49464 transitions. Word has length 2 [2022-11-20 11:04:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:19,145 INFO L495 AbstractCegarLoop]: Abstraction has 17344 states and 49464 transitions. [2022-11-20 11:04:19,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17344 states and 49464 transitions. [2022-11-20 11:04:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:04:19,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:19,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:04:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:04:19,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:04:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1121951, now seen corresponding path program 1 times [2022-11-20 11:04:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:19,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702006686] [2022-11-20 11:04:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702006686] [2022-11-20 11:04:19,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702006686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629857792] [2022-11-20 11:04:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:19,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:19,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:04:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:04:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:04:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:20,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:24,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:24,457 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 46 treesize of output 64 [2022-11-20 11:04:30,677 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629857792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:30,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:30,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 11:04:30,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741040609] [2022-11-20 11:04:30,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:04:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:04:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:30,680 INFO L87 Difference]: Start difference. First operand 17344 states and 49464 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 11:04:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:31,371 INFO L93 Difference]: Finished difference Result 17346 states and 49468 transitions. [2022-11-20 11:04:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:04:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 3 [2022-11-20 11:04:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:31,470 INFO L225 Difference]: With dead ends: 17346 [2022-11-20 11:04:31,470 INFO L226 Difference]: Without dead ends: 17346 [2022-11-20 11:04:31,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:04:31,480 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:31,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 337 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-11-20 11:04:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2022-11-20 11:04:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 17346. [2022-11-20 11:04:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17346 states, 14461 states have (on average 3.4207869441947305) internal successors, (49468), 17345 states have internal predecessors, (49468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17346 states to 17346 states and 49468 transitions. [2022-11-20 11:04:32,301 INFO L78 Accepts]: Start accepts. Automaton has 17346 states and 49468 transitions. Word has length 3 [2022-11-20 11:04:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:32,302 INFO L495 AbstractCegarLoop]: Abstraction has 17346 states and 49468 transitions. [2022-11-20 11:04:32,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 11:04:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17346 states and 49468 transitions. [2022-11-20 11:04:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:04:32,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:32,303 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-11-20 11:04:32,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:32,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:04:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash 34781940, now seen corresponding path program 1 times [2022-11-20 11:04:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:32,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504573370] [2022-11-20 11:04:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:04:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:32,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504573370] [2022-11-20 11:04:32,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504573370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:32,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:32,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:04:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119883753] [2022-11-20 11:04:32,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:04:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:04:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:04:32,698 INFO L87 Difference]: Start difference. First operand 17346 states and 49468 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:33,189 INFO L93 Difference]: Finished difference Result 20710 states and 58201 transitions. [2022-11-20 11:04:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:04:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:04:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:33,330 INFO L225 Difference]: With dead ends: 20710 [2022-11-20 11:04:33,330 INFO L226 Difference]: Without dead ends: 20710 [2022-11-20 11:04:33,331 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 11:04:33,332 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:33,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 22 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:04:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20710 states. [2022-11-20 11:04:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20710 to 17239. [2022-11-20 11:04:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17239 states, 14641 states have (on average 3.41376955126016) internal successors, (49981), 17238 states have internal predecessors, (49981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17239 states to 17239 states and 49981 transitions. [2022-11-20 11:04:34,206 INFO L78 Accepts]: Start accepts. Automaton has 17239 states and 49981 transitions. Word has length 4 [2022-11-20 11:04:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:34,206 INFO L495 AbstractCegarLoop]: Abstraction has 17239 states and 49981 transitions. [2022-11-20 11:04:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 17239 states and 49981 transitions. [2022-11-20 11:04:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:04:34,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:34,208 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 11:04:34,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:04:34,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:04:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1078241503, now seen corresponding path program 2 times [2022-11-20 11:04:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:34,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433780776] [2022-11-20 11:04:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433780776] [2022-11-20 11:04:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433780776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715691099] [2022-11-20 11:04:35,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:35,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:35,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:04:35,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:04:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:35,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:04:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:04:35,641 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:04:35,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:04:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:35,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:04:35,712 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:04:35,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:04:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:35,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:41,829 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:41,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:41,881 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 46 treesize of output 64 [2022-11-20 11:04:44,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:44,252 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 52 treesize of output 70 [2022-11-20 11:04:52,815 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:52,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:52,882 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 58 treesize of output 76 [2022-11-20 11:04:59,391 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:59,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715691099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:59,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:59,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-20 11:04:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430259783] [2022-11-20 11:04:59,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:04:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:04:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:04:59,396 INFO L87 Difference]: Start difference. First operand 17239 states and 49981 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:00,650 INFO L93 Difference]: Finished difference Result 17243 states and 49987 transitions. [2022-11-20 11:05:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:00,806 INFO L225 Difference]: With dead ends: 17243 [2022-11-20 11:05:00,806 INFO L226 Difference]: Without dead ends: 17243 [2022-11-20 11:05:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:05:00,808 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:00,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 444 Invalid, 0 Unknown, 363 Unchecked, 0.7s Time] [2022-11-20 11:05:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17243 states. [2022-11-20 11:05:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17243 to 17243. [2022-11-20 11:05:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17243 states, 14645 states have (on average 3.413246841925572) internal successors, (49987), 17242 states have internal predecessors, (49987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17243 states to 17243 states and 49987 transitions. [2022-11-20 11:05:01,307 INFO L78 Accepts]: Start accepts. Automaton has 17243 states and 49987 transitions. Word has length 5 [2022-11-20 11:05:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:01,307 INFO L495 AbstractCegarLoop]: Abstraction has 17243 states and 49987 transitions. [2022-11-20 11:05:01,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17243 states and 49987 transitions. [2022-11-20 11:05:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:05:01,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:01,308 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 11:05:01,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:01,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1103010733, now seen corresponding path program 1 times [2022-11-20 11:05:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:01,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324827690] [2022-11-20 11:05:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:05:01,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324827690] [2022-11-20 11:05:01,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324827690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:01,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:01,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866129522] [2022-11-20 11:05:01,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:01,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:01,798 INFO L87 Difference]: Start difference. First operand 17243 states and 49987 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:02,145 INFO L93 Difference]: Finished difference Result 16385 states and 47513 transitions. [2022-11-20 11:05:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:05:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:02,197 INFO L225 Difference]: With dead ends: 16385 [2022-11-20 11:05:02,197 INFO L226 Difference]: Without dead ends: 16385 [2022-11-20 11:05:02,198 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 11:05:02,198 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:02,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 22 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16385 states. [2022-11-20 11:05:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16385 to 16385. [2022-11-20 11:05:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16385 states, 14034 states have (on average 3.3855636311814163) internal successors, (47513), 16384 states have internal predecessors, (47513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16385 states to 16385 states and 47513 transitions. [2022-11-20 11:05:02,709 INFO L78 Accepts]: Start accepts. Automaton has 16385 states and 47513 transitions. Word has length 7 [2022-11-20 11:05:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:02,709 INFO L495 AbstractCegarLoop]: Abstraction has 16385 states and 47513 transitions. [2022-11-20 11:05:02,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16385 states and 47513 transitions. [2022-11-20 11:05:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:05:02,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:02,711 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 11:05:02,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:05:02,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1103010734, now seen corresponding path program 1 times [2022-11-20 11:05:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197816655] [2022-11-20 11:05:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:02,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197816655] [2022-11-20 11:05:02,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197816655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123516174] [2022-11-20 11:05:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:02,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:02,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:05:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:05:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:03,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:03,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123516174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:03,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:03,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 11:05:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802416219] [2022-11-20 11:05:03,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:05:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:05:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:05:03,257 INFO L87 Difference]: Start difference. First operand 16385 states and 47513 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:03,843 INFO L93 Difference]: Finished difference Result 16390 states and 47516 transitions. [2022-11-20 11:05:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:05:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:05:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:03,923 INFO L225 Difference]: With dead ends: 16390 [2022-11-20 11:05:03,924 INFO L226 Difference]: Without dead ends: 16390 [2022-11-20 11:05:03,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:05:03,926 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:03,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 76 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:05:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16390 states. [2022-11-20 11:05:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16390 to 16388. [2022-11-20 11:05:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16388 states, 14037 states have (on average 3.3850537864216) internal successors, (47516), 16387 states have internal predecessors, (47516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16388 states to 16388 states and 47516 transitions. [2022-11-20 11:05:04,576 INFO L78 Accepts]: Start accepts. Automaton has 16388 states and 47516 transitions. Word has length 7 [2022-11-20 11:05:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:04,576 INFO L495 AbstractCegarLoop]: Abstraction has 16388 states and 47516 transitions. [2022-11-20 11:05:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16388 states and 47516 transitions. [2022-11-20 11:05:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:04,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:04,578 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1] [2022-11-20 11:05:04,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:04,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:05:04,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -861729441, now seen corresponding path program 3 times [2022-11-20 11:05:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:04,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375667265] [2022-11-20 11:05:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:06,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375667265] [2022-11-20 11:05:06,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375667265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:06,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664885649] [2022-11-20 11:05:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:05:06,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:06,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:05:13,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:05:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 11:05:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:13,606 INFO L321 Elim1Store]: treesize reduction 24, result has 14.3 percent of original size [2022-11-20 11:05:13,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 16 [2022-11-20 11:05:13,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:13,688 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:13,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:13,780 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:13,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:13,888 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:13,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:13,991 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:13,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:14,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:14,070 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:14,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:14,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:14,163 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:14,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:14,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:20,316 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:05:20,355 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:20,355 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 13 treesize of output 12 [2022-11-20 11:05:20,482 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:20,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 11:05:20,657 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:20,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 11:05:20,889 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:20,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 11:05:21,161 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:21,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 11:05:21,799 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:05:21,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 11:05:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:24,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664885649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:24,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:24,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-20 11:05:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557849494] [2022-11-20 11:05:24,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:24,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:05:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:05:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:05:24,442 INFO L87 Difference]: Start difference. First operand 16388 states and 47516 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:34,203 INFO L93 Difference]: Finished difference Result 16393 states and 47523 transitions. [2022-11-20 11:05:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:05:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:34,269 INFO L225 Difference]: With dead ends: 16393 [2022-11-20 11:05:34,269 INFO L226 Difference]: Without dead ends: 16393 [2022-11-20 11:05:34,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:05:34,271 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:34,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 121 Unchecked, 1.0s Time] [2022-11-20 11:05:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2022-11-20 11:05:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 16393. [2022-11-20 11:05:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 14042 states have (on average 3.3843469591226323) internal successors, (47523), 16392 states have internal predecessors, (47523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 47523 transitions. [2022-11-20 11:05:34,731 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 47523 transitions. Word has length 9 [2022-11-20 11:05:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:34,732 INFO L495 AbstractCegarLoop]: Abstraction has 16393 states and 47523 transitions. [2022-11-20 11:05:34,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 47523 transitions. [2022-11-20 11:05:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:05:34,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:34,733 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-20 11:05:34,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:34,946 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2110051730, now seen corresponding path program 2 times [2022-11-20 11:05:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:34,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331748791] [2022-11-20 11:05:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:35,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:35,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331748791] [2022-11-20 11:05:35,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331748791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:35,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072299960] [2022-11-20 11:05:35,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:35,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:35,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:35,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:05:35,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:35,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:05:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:35,766 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 11:05:35,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:35,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072299960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:35,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:35,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-20 11:05:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967566696] [2022-11-20 11:05:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:35,797 INFO L87 Difference]: Start difference. First operand 16393 states and 47523 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:36,142 INFO L93 Difference]: Finished difference Result 16166 states and 47066 transitions. [2022-11-20 11:05:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:05:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:36,213 INFO L225 Difference]: With dead ends: 16166 [2022-11-20 11:05:36,213 INFO L226 Difference]: Without dead ends: 16166 [2022-11-20 11:05:36,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:36,214 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:36,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16166 states. [2022-11-20 11:05:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16166 to 16166. [2022-11-20 11:05:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16166 states, 13869 states have (on average 3.3936116518855) internal successors, (47066), 16165 states have internal predecessors, (47066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16166 states to 16166 states and 47066 transitions. [2022-11-20 11:05:36,834 INFO L78 Accepts]: Start accepts. Automaton has 16166 states and 47066 transitions. Word has length 13 [2022-11-20 11:05:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:36,835 INFO L495 AbstractCegarLoop]: Abstraction has 16166 states and 47066 transitions. [2022-11-20 11:05:36,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16166 states and 47066 transitions. [2022-11-20 11:05:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:05:36,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:36,836 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:36,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:37,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:37,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash 591032051, now seen corresponding path program 1 times [2022-11-20 11:05:37,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:37,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94722036] [2022-11-20 11:05:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:37,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94722036] [2022-11-20 11:05:37,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94722036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483222257] [2022-11-20 11:05:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:37,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:37,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:37,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:05:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:37,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:05:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:38,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:38,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483222257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:38,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:38,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 11:05:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031514779] [2022-11-20 11:05:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:38,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:05:38,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:05:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:05:38,282 INFO L87 Difference]: Start difference. First operand 16166 states and 47066 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:38,864 INFO L93 Difference]: Finished difference Result 16179 states and 47075 transitions. [2022-11-20 11:05:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:05:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 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 11:05:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:38,925 INFO L225 Difference]: With dead ends: 16179 [2022-11-20 11:05:38,925 INFO L226 Difference]: Without dead ends: 16179 [2022-11-20 11:05:38,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:05:38,927 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:38,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:05:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16179 states. [2022-11-20 11:05:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16179 to 16173. [2022-11-20 11:05:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16173 states, 13876 states have (on average 3.392548284808302) internal successors, (47075), 16172 states have internal predecessors, (47075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16173 states to 16173 states and 47075 transitions. [2022-11-20 11:05:39,277 INFO L78 Accepts]: Start accepts. Automaton has 16173 states and 47075 transitions. Word has length 16 [2022-11-20 11:05:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:39,277 INFO L495 AbstractCegarLoop]: Abstraction has 16173 states and 47075 transitions. [2022-11-20 11:05:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16173 states and 47075 transitions. [2022-11-20 11:05:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:05:39,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:39,278 INFO L195 NwaCegarLoop]: trace histogram [15, 1, 1] [2022-11-20 11:05:39,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:05:39,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:05:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1372776865, now seen corresponding path program 4 times [2022-11-20 11:05:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024402496] [2022-11-20 11:05:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024402496] [2022-11-20 11:05:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024402496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712133306] [2022-11-20 11:05:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:05:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:44,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:44,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:05:45,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:05:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 166 conjunts are in the unsatisfiable core [2022-11-20 11:05:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:45,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,622 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:45,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,722 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:45,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,825 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:45,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:45,927 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:45,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,033 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,149 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,257 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,359 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,472 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,573 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,726 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,849 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:46,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:05:46,956 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:46,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:05:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:47,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:53,167 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:05:53,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:53,211 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 46 treesize of output 64 [2022-11-20 11:05:57,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:57,527 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 52 treesize of output 70 [2022-11-20 11:06:01,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:01,931 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 58 treesize of output 76 [2022-11-20 11:06:04,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:04,375 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 64 treesize of output 82 [2022-11-20 11:06:08,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:08,993 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 70 treesize of output 88 [2022-11-20 11:06:13,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:13,445 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 76 treesize of output 94 [2022-11-20 11:06:13,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:13,911 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 82 treesize of output 100 [2022-11-20 11:06:16,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:16,839 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 88 treesize of output 106 [2022-11-20 11:06:22,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:22,903 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 94 treesize of output 112 [2022-11-20 11:06:27,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:27,739 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 100 treesize of output 118 [2022-11-20 11:06:32,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:32,915 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 106 treesize of output 124 [2022-11-20 11:06:33,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:33,785 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 112 treesize of output 130 [2022-11-20 11:06:34,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:34,820 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 118 treesize of output 136 [2022-11-20 11:06:42,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:42,222 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 124 treesize of output 142 [2022-11-20 11:06:45,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:45,362 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 130 treesize of output 148 [2022-11-20 11:06:58,161 WARN L233 SmtUtils]: Spent 10.19s on a formula simplification. DAG size of input: 91 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:06:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 119 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712133306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:58,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:58,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-20 11:06:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041185692] [2022-11-20 11:06:58,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:06:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:06:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2039, Unknown=3, NotChecked=0, Total=2450 [2022-11-20 11:06:58,167 INFO L87 Difference]: Start difference. First operand 16173 states and 47075 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:51,948 INFO L93 Difference]: Finished difference Result 16182 states and 47086 transitions. [2022-11-20 11:07:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:07:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:07:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:52,022 INFO L225 Difference]: With dead ends: 16182 [2022-11-20 11:07:52,022 INFO L226 Difference]: Without dead ends: 16182 [2022-11-20 11:07:52,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 116.7s TimeCoverageRelationStatistics Valid=1211, Invalid=4035, Unknown=10, NotChecked=0, Total=5256 [2022-11-20 11:07:52,024 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1056 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:52,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 315 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1631 Invalid, 0 Unknown, 1056 Unchecked, 3.5s Time] [2022-11-20 11:07:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16182 states. [2022-11-20 11:07:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16182 to 16182. [2022-11-20 11:07:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16182 states, 13885 states have (on average 3.3911415196254953) internal successors, (47086), 16181 states have internal predecessors, (47086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16182 states to 16182 states and 47086 transitions. [2022-11-20 11:07:52,361 INFO L78 Accepts]: Start accepts. Automaton has 16182 states and 47086 transitions. Word has length 17 [2022-11-20 11:07:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:52,361 INFO L495 AbstractCegarLoop]: Abstraction has 16182 states and 47086 transitions. [2022-11-20 11:07:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 16182 states and 47086 transitions. [2022-11-20 11:07:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:07:52,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:52,363 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:52,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:52,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:07:52,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:07:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -259092109, now seen corresponding path program 2 times [2022-11-20 11:07:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:07:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522916606] [2022-11-20 11:07:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:07:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:07:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:07:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:07:53,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:07:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522916606] [2022-11-20 11:07:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522916606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:07:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760511631] [2022-11-20 11:07:53,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:53,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:07:53,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:07:54,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:07:54,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:07:54,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:07:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:07:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:07:54,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:07:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:07:55,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760511631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:07:55,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:07:55,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 11:07:55,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014849816] [2022-11-20 11:07:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:07:55,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:07:55,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:07:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:07:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:07:55,650 INFO L87 Difference]: Start difference. First operand 16182 states and 47086 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:56,383 INFO L93 Difference]: Finished difference Result 16211 states and 47107 transitions. [2022-11-20 11:07:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 11:07:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 11:07:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:56,432 INFO L225 Difference]: With dead ends: 16211 [2022-11-20 11:07:56,432 INFO L226 Difference]: Without dead ends: 16211 [2022-11-20 11:07:56,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:07:56,433 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:56,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 76 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:07:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2022-11-20 11:07:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16197. [2022-11-20 11:07:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16197 states, 13900 states have (on average 3.3889928057553957) internal successors, (47107), 16196 states have internal predecessors, (47107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16197 states to 16197 states and 47107 transitions. [2022-11-20 11:07:56,859 INFO L78 Accepts]: Start accepts. Automaton has 16197 states and 47107 transitions. Word has length 28 [2022-11-20 11:07:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:56,859 INFO L495 AbstractCegarLoop]: Abstraction has 16197 states and 47107 transitions. [2022-11-20 11:07:56,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16197 states and 47107 transitions. [2022-11-20 11:07:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:07:56,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:56,860 INFO L195 NwaCegarLoop]: trace histogram [31, 1, 1] [2022-11-20 11:07:56,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:57,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:07:57,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-20 11:07:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1408641119, now seen corresponding path program 5 times [2022-11-20 11:07:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:07:57,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426961774] [2022-11-20 11:07:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:07:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426961774] [2022-11-20 11:08:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426961774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821302645] [2022-11-20 11:08:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:08:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:12,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:13,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9abce74-1d9e-473a-8c48-24937803eb81/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process