./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/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_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/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_c1654071-29b9-4abe-91b3-3a6c95a82996/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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- 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 12:41:56,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:41:56,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:41:56,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:41:56,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:41:56,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:41:56,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:41:56,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:41:56,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:41:56,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:41:56,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:41:56,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:41:56,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:41:56,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:41:56,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:41:56,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:41:56,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:41:56,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:41:56,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:41:56,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:41:56,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:41:56,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:41:56,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:41:56,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:41:56,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:41:56,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:41:56,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:41:56,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:41:56,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:41:56,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:41:56,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:41:56,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:41:56,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:41:56,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:41:56,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:41:56,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:41:56,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:41:56,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:41:56,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:41:56,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:41:56,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:41:56,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:41:56,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:41:56,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:41:56,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:41:56,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:41:56,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:41:56,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:41:56,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:41:56,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:41:56,303 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:41:56,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:41:56,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:41:56,303 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:41:56,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:41:56,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:41:56,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:41:56,304 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:41:56,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:41:56,305 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:41:56,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:41:56,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:41:56,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:41:56,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:41:56,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:41:56,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:41:56,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:41:56,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:41:56,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:41:56,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:41:56,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:41:56,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:41:56,308 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_c1654071-29b9-4abe-91b3-3a6c95a82996/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-11-20 12:41:56,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:41:56,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:41:56,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:41:56,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:41:56,632 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:41:56,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-20 12:41:59,775 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:42:00,092 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:42:00,093 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-20 12:42:00,116 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/data/4874c51b9/d82730e9c49d4a50bb809d95846dc5da/FLAGc46e5fa3a [2022-11-20 12:42:00,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/data/4874c51b9/d82730e9c49d4a50bb809d95846dc5da [2022-11-20 12:42:00,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:42:00,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:42:00,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:42:00,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:42:00,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:42:00,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcfd1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00, skipping insertion in model container [2022-11-20 12:42:00,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:42:00,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:42:00,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:42:00,655 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:42:00,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:42:00,784 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:42:00,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00 WrapperNode [2022-11-20 12:42:00,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:42:00,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:42:00,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:42:00,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:42:00,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,872 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2022-11-20 12:42:00,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:42:00,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:42:00,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:42:00,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:42:00,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:42:00,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:42:00,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:42:00,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:42:00,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (1/1) ... [2022-11-20 12:42:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:42:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:00,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:42:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:42:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-20 12:42:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-20 12:42:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:42:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 12:42:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:42:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:42:01,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:42:01,234 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:42:01,253 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:42:01,807 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:42:01,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:42:01,815 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 12:42:01,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:42:01 BoogieIcfgContainer [2022-11-20 12:42:01,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:42:01,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:42:01,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:42:01,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:42:01,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:42:00" (1/3) ... [2022-11-20 12:42:01,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314cc433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:42:01, skipping insertion in model container [2022-11-20 12:42:01,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:42:00" (2/3) ... [2022-11-20 12:42:01,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314cc433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:42:01, skipping insertion in model container [2022-11-20 12:42:01,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:42:01" (3/3) ... [2022-11-20 12:42:01,828 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-11-20 12:42:01,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:42:01,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-20 12:42:01,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:42:01,954 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;@ed47909, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:42:01,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-20 12:42:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:42:01,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:01,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:42:01,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2022-11-20 12:42:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281812299] [2022-11-20 12:42:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:02,135 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 12:42:02,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:02,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281812299] [2022-11-20 12:42:02,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281812299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:02,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:02,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:42:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264479652] [2022-11-20 12:42:02,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:02,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:42:02,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:42:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:42:02,174 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:02,206 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2022-11-20 12:42:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:42:02,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 12:42:02,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:02,217 INFO L225 Difference]: With dead ends: 147 [2022-11-20 12:42:02,218 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 12:42:02,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 12:42:02,223 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:02,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 12:42:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-20 12:42:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2022-11-20 12:42:02,269 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2022-11-20 12:42:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:02,270 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2022-11-20 12:42:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2022-11-20 12:42:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:42:02,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:02,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:02,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:42:02,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2022-11-20 12:42:02,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314048775] [2022-11-20 12:42:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:02,412 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 12:42:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314048775] [2022-11-20 12:42:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314048775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:02,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504580186] [2022-11-20 12:42:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:02,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:02,416 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:02,485 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2022-11-20 12:42:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-20 12:42:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:02,488 INFO L225 Difference]: With dead ends: 286 [2022-11-20 12:42:02,489 INFO L226 Difference]: Without dead ends: 286 [2022-11-20 12:42:02,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:02,491 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:02,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-20 12:42:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2022-11-20 12:42:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2022-11-20 12:42:02,516 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2022-11-20 12:42:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:02,517 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2022-11-20 12:42:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2022-11-20 12:42:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:42:02,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:02,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:02,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:42:02,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2022-11-20 12:42:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:02,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617487809] [2022-11-20 12:42:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:02,838 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 12:42:02,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:02,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617487809] [2022-11-20 12:42:02,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617487809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:02,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:02,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:42:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046199771] [2022-11-20 12:42:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:02,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:02,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:02,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:02,850 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:03,207 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2022-11-20 12:42:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-20 12:42:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:03,209 INFO L225 Difference]: With dead ends: 266 [2022-11-20 12:42:03,209 INFO L226 Difference]: Without dead ends: 266 [2022-11-20 12:42:03,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:03,211 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:03,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-20 12:42:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2022-11-20 12:42:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:42:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2022-11-20 12:42:03,235 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2022-11-20 12:42:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:03,247 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2022-11-20 12:42:03,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2022-11-20 12:42:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:42:03,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:03,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:03,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:42:03,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2022-11-20 12:42:03,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501028345] [2022-11-20 12:42:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:03,362 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 12:42:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501028345] [2022-11-20 12:42:03,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501028345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:03,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:03,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:42:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347998697] [2022-11-20 12:42:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:03,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:03,365 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:03,612 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2022-11-20 12:42:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:03,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-20 12:42:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:03,621 INFO L225 Difference]: With dead ends: 381 [2022-11-20 12:42:03,622 INFO L226 Difference]: Without dead ends: 381 [2022-11-20 12:42:03,622 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 12:42:03,632 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:03,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 211 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-20 12:42:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2022-11-20 12:42:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2022-11-20 12:42:03,672 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2022-11-20 12:42:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:03,672 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2022-11-20 12:42:03,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2022-11-20 12:42:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:42:03,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:03,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:42:03,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2022-11-20 12:42:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856364310] [2022-11-20 12:42:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:03,843 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 12:42:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856364310] [2022-11-20 12:42:03,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856364310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:03,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:03,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:42:03,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240882623] [2022-11-20 12:42:03,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:03,850 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:04,055 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2022-11-20 12:42:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-20 12:42:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:04,058 INFO L225 Difference]: With dead ends: 351 [2022-11-20 12:42:04,058 INFO L226 Difference]: Without dead ends: 351 [2022-11-20 12:42:04,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:04,065 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:04,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 365 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-20 12:42:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 280. [2022-11-20 12:42:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2022-11-20 12:42:04,103 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2022-11-20 12:42:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:04,103 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2022-11-20 12:42:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2022-11-20 12:42:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:42:04,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:04,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:42:04,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2022-11-20 12:42:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:04,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094309893] [2022-11-20 12:42:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:04,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,156 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 12:42:04,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:04,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094309893] [2022-11-20 12:42:04,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094309893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:04,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:04,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877586061] [2022-11-20 12:42:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:04,159 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:04,178 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2022-11-20 12:42:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 12:42:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:04,180 INFO L225 Difference]: With dead ends: 383 [2022-11-20 12:42:04,181 INFO L226 Difference]: Without dead ends: 383 [2022-11-20 12:42:04,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:04,182 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:04,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-20 12:42:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 282. [2022-11-20 12:42:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2022-11-20 12:42:04,191 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2022-11-20 12:42:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:04,192 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2022-11-20 12:42:04,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2022-11-20 12:42:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:42:04,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:04,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:04,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:42:04,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2022-11-20 12:42:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:04,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33253637] [2022-11-20 12:42:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:04,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,219 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 12:42:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33253637] [2022-11-20 12:42:04,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33253637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:04,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:04,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:42:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804927286] [2022-11-20 12:42:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:04,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:04,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:04,222 INFO L87 Difference]: Start difference. First operand 282 states and 397 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:04,329 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2022-11-20 12:42:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 12:42:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:04,331 INFO L225 Difference]: With dead ends: 337 [2022-11-20 12:42:04,331 INFO L226 Difference]: Without dead ends: 330 [2022-11-20 12:42:04,332 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 12:42:04,332 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-20 12:42:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2022-11-20 12:42:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2022-11-20 12:42:04,341 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2022-11-20 12:42:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:04,341 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2022-11-20 12:42:04,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:42:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2022-11-20 12:42:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:42:04,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:04,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:04,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:42:04,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2022-11-20 12:42:04,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:04,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993733076] [2022-11-20 12:42:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:04,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,425 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 12:42:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:04,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993733076] [2022-11-20 12:42:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993733076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:04,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:04,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:42:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36801031] [2022-11-20 12:42:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:04,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:04,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:04,428 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:04,457 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2022-11-20 12:42:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-20 12:42:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:04,459 INFO L225 Difference]: With dead ends: 439 [2022-11-20 12:42:04,460 INFO L226 Difference]: Without dead ends: 439 [2022-11-20 12:42:04,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:04,462 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:04,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-20 12:42:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2022-11-20 12:42:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2022-11-20 12:42:04,475 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2022-11-20 12:42:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:04,476 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2022-11-20 12:42:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2022-11-20 12:42:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:42:04,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:04,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:04,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:42:04,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2022-11-20 12:42:04,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344579238] [2022-11-20 12:42:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:04,561 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 12:42:04,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344579238] [2022-11-20 12:42:04,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344579238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:04,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:04,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:04,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166701782] [2022-11-20 12:42:04,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:04,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:04,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:04,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:04,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:04,563 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:04,854 INFO L93 Difference]: Finished difference Result 406 states and 490 transitions. [2022-11-20 12:42:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-20 12:42:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:04,856 INFO L225 Difference]: With dead ends: 406 [2022-11-20 12:42:04,857 INFO L226 Difference]: Without dead ends: 406 [2022-11-20 12:42:04,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:04,860 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:04,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 357 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-20 12:42:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 283. [2022-11-20 12:42:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2022-11-20 12:42:04,874 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2022-11-20 12:42:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:04,875 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2022-11-20 12:42:04,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2022-11-20 12:42:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:42:04,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:04,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:04,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:42:04,878 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2022-11-20 12:42:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692575658] [2022-11-20 12:42:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,080 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 12:42:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:05,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692575658] [2022-11-20 12:42:05,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692575658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:05,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:05,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:42:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490790499] [2022-11-20 12:42:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:05,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:42:05,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:42:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:05,083 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:05,378 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2022-11-20 12:42:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:42:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-20 12:42:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:05,380 INFO L225 Difference]: With dead ends: 323 [2022-11-20 12:42:05,380 INFO L226 Difference]: Without dead ends: 323 [2022-11-20 12:42:05,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:42:05,381 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 97 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:05,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 609 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-20 12:42:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2022-11-20 12:42:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2022-11-20 12:42:05,390 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2022-11-20 12:42:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:05,390 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2022-11-20 12:42:05,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2022-11-20 12:42:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:42:05,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:05,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:42:05,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2022-11-20 12:42:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:05,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788848012] [2022-11-20 12:42:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,501 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 12:42:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788848012] [2022-11-20 12:42:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788848012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:05,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596206627] [2022-11-20 12:42:05,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:05,508 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:05,775 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2022-11-20 12:42:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-20 12:42:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:05,778 INFO L225 Difference]: With dead ends: 466 [2022-11-20 12:42:05,778 INFO L226 Difference]: Without dead ends: 466 [2022-11-20 12:42:05,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:05,779 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:05,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 370 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-20 12:42:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 293. [2022-11-20 12:42:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2022-11-20 12:42:05,788 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2022-11-20 12:42:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:05,789 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2022-11-20 12:42:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2022-11-20 12:42:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:42:05,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:05,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:42:05,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2022-11-20 12:42:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:05,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955564594] [2022-11-20 12:42:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:05,906 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 12:42:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955564594] [2022-11-20 12:42:05,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955564594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:05,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:05,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127922230] [2022-11-20 12:42:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:05,909 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:06,142 INFO L93 Difference]: Finished difference Result 342 states and 419 transitions. [2022-11-20 12:42:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-20 12:42:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:06,145 INFO L225 Difference]: With dead ends: 342 [2022-11-20 12:42:06,145 INFO L226 Difference]: Without dead ends: 342 [2022-11-20 12:42:06,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:06,146 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:06,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 374 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-20 12:42:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 293. [2022-11-20 12:42:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2022-11-20 12:42:06,158 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2022-11-20 12:42:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:06,160 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2022-11-20 12:42:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2022-11-20 12:42:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:42:06,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:06,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:42:06,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2022-11-20 12:42:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042383362] [2022-11-20 12:42:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,231 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 12:42:06,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042383362] [2022-11-20 12:42:06,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042383362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:06,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:06,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:42:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332678425] [2022-11-20 12:42:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:06,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:06,234 INFO L87 Difference]: Start difference. First operand 293 states and 393 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:06,359 INFO L93 Difference]: Finished difference Result 385 states and 494 transitions. [2022-11-20 12:42:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:42:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:06,362 INFO L225 Difference]: With dead ends: 385 [2022-11-20 12:42:06,362 INFO L226 Difference]: Without dead ends: 385 [2022-11-20 12:42:06,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 12:42:06,364 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:06,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 263 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-20 12:42:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 290. [2022-11-20 12:42:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2022-11-20 12:42:06,380 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2022-11-20 12:42:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:06,381 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2022-11-20 12:42:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2022-11-20 12:42:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:42:06,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:06,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:06,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:42:06,384 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2022-11-20 12:42:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747570150] [2022-11-20 12:42:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,515 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 12:42:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:06,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747570150] [2022-11-20 12:42:06,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747570150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:06,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:06,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237985589] [2022-11-20 12:42:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:06,519 INFO L87 Difference]: Start difference. First operand 290 states and 387 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:06,745 INFO L93 Difference]: Finished difference Result 505 states and 618 transitions. [2022-11-20 12:42:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:42:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:06,748 INFO L225 Difference]: With dead ends: 505 [2022-11-20 12:42:06,748 INFO L226 Difference]: Without dead ends: 505 [2022-11-20 12:42:06,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:06,748 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 363 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:06,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 423 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-20 12:42:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 293. [2022-11-20 12:42:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2022-11-20 12:42:06,757 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2022-11-20 12:42:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:06,757 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2022-11-20 12:42:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2022-11-20 12:42:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:42:06,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:06,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:06,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:42:06,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2022-11-20 12:42:06,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:06,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708685637] [2022-11-20 12:42:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:06,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:06,858 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 12:42:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708685637] [2022-11-20 12:42:06,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708685637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:06,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828326820] [2022-11-20 12:42:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:06,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:06,861 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:07,095 INFO L93 Difference]: Finished difference Result 504 states and 616 transitions. [2022-11-20 12:42:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-20 12:42:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:07,098 INFO L225 Difference]: With dead ends: 504 [2022-11-20 12:42:07,099 INFO L226 Difference]: Without dead ends: 504 [2022-11-20 12:42:07,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:07,101 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 288 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:07,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 492 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-20 12:42:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 295. [2022-11-20 12:42:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2022-11-20 12:42:07,110 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2022-11-20 12:42:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:07,111 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2022-11-20 12:42:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2022-11-20 12:42:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:42:07,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:07,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:42:07,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2022-11-20 12:42:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:07,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412387075] [2022-11-20 12:42:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:07,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:07,325 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 12:42:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412387075] [2022-11-20 12:42:07,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412387075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:07,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:07,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:42:07,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386375305] [2022-11-20 12:42:07,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:07,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:07,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:07,330 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:07,490 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2022-11-20 12:42:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:42:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-20 12:42:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:07,494 INFO L225 Difference]: With dead ends: 328 [2022-11-20 12:42:07,494 INFO L226 Difference]: Without dead ends: 328 [2022-11-20 12:42:07,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:42:07,495 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 337 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:07,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 991 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-20 12:42:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-11-20 12:42:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 282 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2022-11-20 12:42:07,506 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 21 [2022-11-20 12:42:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:07,507 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2022-11-20 12:42:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2022-11-20 12:42:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:42:07,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:07,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:42:07,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1952291460, now seen corresponding path program 1 times [2022-11-20 12:42:07,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027452149] [2022-11-20 12:42:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:07,685 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 12:42:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:07,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027452149] [2022-11-20 12:42:07,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027452149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:07,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:07,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:42:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523446596] [2022-11-20 12:42:07,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:07,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:07,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:07,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:07,688 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:07,822 INFO L93 Difference]: Finished difference Result 318 states and 379 transitions. [2022-11-20 12:42:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:42:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-20 12:42:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:07,826 INFO L225 Difference]: With dead ends: 318 [2022-11-20 12:42:07,826 INFO L226 Difference]: Without dead ends: 318 [2022-11-20 12:42:07,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:42:07,827 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 326 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:07,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 998 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-20 12:42:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2022-11-20 12:42:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:42:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2022-11-20 12:42:07,837 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2022-11-20 12:42:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:07,837 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2022-11-20 12:42:07,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2022-11-20 12:42:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:42:07,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:07,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:07,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:42:07,842 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2022-11-20 12:42:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835989408] [2022-11-20 12:42:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:08,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:08,466 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 12:42:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835989408] [2022-11-20 12:42:08,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835989408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:08,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:08,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:42:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494470868] [2022-11-20 12:42:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:08,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:42:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:42:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:42:08,469 INFO L87 Difference]: Start difference. First operand 285 states and 375 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:09,345 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2022-11-20 12:42:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:42:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-20 12:42:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:09,347 INFO L225 Difference]: With dead ends: 398 [2022-11-20 12:42:09,348 INFO L226 Difference]: Without dead ends: 396 [2022-11-20 12:42:09,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:42:09,348 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 237 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:09,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 805 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:42:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-20 12:42:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 337. [2022-11-20 12:42:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 12:42:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2022-11-20 12:42:09,363 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2022-11-20 12:42:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:09,363 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2022-11-20 12:42:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2022-11-20 12:42:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:42:09,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:09,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:09,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:42:09,365 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2022-11-20 12:42:09,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:09,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531480976] [2022-11-20 12:42:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:09,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:09,478 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 12:42:09,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531480976] [2022-11-20 12:42:09,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531480976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:09,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418956492] [2022-11-20 12:42:09,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:42:09,480 INFO L87 Difference]: Start difference. First operand 337 states and 450 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:09,761 INFO L93 Difference]: Finished difference Result 504 states and 649 transitions. [2022-11-20 12:42:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-20 12:42:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:09,764 INFO L225 Difference]: With dead ends: 504 [2022-11-20 12:42:09,764 INFO L226 Difference]: Without dead ends: 504 [2022-11-20 12:42:09,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:09,764 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 224 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:09,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 354 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-20 12:42:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 361. [2022-11-20 12:42:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.6245733788395904) internal successors, (476), 344 states have internal predecessors, (476), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 12:42:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2022-11-20 12:42:09,775 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 25 [2022-11-20 12:42:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:09,775 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2022-11-20 12:42:09,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2022-11-20 12:42:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:42:09,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:09,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:09,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:42:09,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2022-11-20 12:42:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368049742] [2022-11-20 12:42:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:10,009 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 12:42:10,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:10,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368049742] [2022-11-20 12:42:10,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368049742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:10,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:10,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:42:10,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459975778] [2022-11-20 12:42:10,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:42:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:42:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:10,012 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:10,320 INFO L93 Difference]: Finished difference Result 412 states and 520 transitions. [2022-11-20 12:42:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-20 12:42:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:10,322 INFO L225 Difference]: With dead ends: 412 [2022-11-20 12:42:10,322 INFO L226 Difference]: Without dead ends: 412 [2022-11-20 12:42:10,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:42:10,323 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 333 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:10,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 434 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-20 12:42:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2022-11-20 12:42:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.583617747440273) internal successors, (464), 344 states have internal predecessors, (464), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 12:42:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2022-11-20 12:42:10,333 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 25 [2022-11-20 12:42:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:10,333 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2022-11-20 12:42:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2022-11-20 12:42:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:42:10,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:10,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:42:10,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2022-11-20 12:42:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:10,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640001204] [2022-11-20 12:42:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:10,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:10,741 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 12:42:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640001204] [2022-11-20 12:42:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640001204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:42:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230258151] [2022-11-20 12:42:10,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:42:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:42:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:42:10,744 INFO L87 Difference]: Start difference. First operand 361 states and 486 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:11,228 INFO L93 Difference]: Finished difference Result 639 states and 825 transitions. [2022-11-20 12:42:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:42:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-20 12:42:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:11,231 INFO L225 Difference]: With dead ends: 639 [2022-11-20 12:42:11,231 INFO L226 Difference]: Without dead ends: 639 [2022-11-20 12:42:11,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:42:11,232 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 516 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:11,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1099 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-20 12:42:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 423. [2022-11-20 12:42:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 352 states have (on average 1.5482954545454546) internal successors, (545), 403 states have internal predecessors, (545), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 12:42:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 571 transitions. [2022-11-20 12:42:11,245 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 571 transitions. Word has length 25 [2022-11-20 12:42:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:11,245 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 571 transitions. [2022-11-20 12:42:11,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 571 transitions. [2022-11-20 12:42:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:42:11,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:11,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:11,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:42:11,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2022-11-20 12:42:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:11,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056630069] [2022-11-20 12:42:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:11,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:11,465 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 12:42:11,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:11,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056630069] [2022-11-20 12:42:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056630069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:11,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:42:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701792025] [2022-11-20 12:42:11,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:11,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:11,468 INFO L87 Difference]: Start difference. First operand 423 states and 571 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:11,837 INFO L93 Difference]: Finished difference Result 532 states and 666 transitions. [2022-11-20 12:42:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:42:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-20 12:42:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:11,840 INFO L225 Difference]: With dead ends: 532 [2022-11-20 12:42:11,840 INFO L226 Difference]: Without dead ends: 532 [2022-11-20 12:42:11,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:42:11,841 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 956 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:11,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 342 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-20 12:42:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 439. [2022-11-20 12:42:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 373 states have (on average 1.5308310991957104) internal successors, (571), 418 states have internal predecessors, (571), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 12:42:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 599 transitions. [2022-11-20 12:42:11,854 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 599 transitions. Word has length 27 [2022-11-20 12:42:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:11,854 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 599 transitions. [2022-11-20 12:42:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 599 transitions. [2022-11-20 12:42:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:42:11,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:11,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:42:11,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1109766870, now seen corresponding path program 1 times [2022-11-20 12:42:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:11,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026948110] [2022-11-20 12:42:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,021 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 12:42:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026948110] [2022-11-20 12:42:12,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026948110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:12,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:12,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:42:12,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097525317] [2022-11-20 12:42:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:12,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:12,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:12,024 INFO L87 Difference]: Start difference. First operand 439 states and 599 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:12,366 INFO L93 Difference]: Finished difference Result 691 states and 907 transitions. [2022-11-20 12:42:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:42:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-20 12:42:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:12,369 INFO L225 Difference]: With dead ends: 691 [2022-11-20 12:42:12,370 INFO L226 Difference]: Without dead ends: 691 [2022-11-20 12:42:12,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:12,370 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 466 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:12,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 939 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-20 12:42:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 436. [2022-11-20 12:42:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 373 states have (on average 1.5040214477211795) internal successors, (561), 415 states have internal predecessors, (561), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 12:42:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 589 transitions. [2022-11-20 12:42:12,383 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 589 transitions. Word has length 28 [2022-11-20 12:42:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:12,383 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 589 transitions. [2022-11-20 12:42:12,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 589 transitions. [2022-11-20 12:42:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:42:12,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:12,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:12,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:42:12,385 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2022-11-20 12:42:12,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:12,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823483227] [2022-11-20 12:42:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:12,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,506 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 12:42:12,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:12,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823483227] [2022-11-20 12:42:12,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823483227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:12,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:12,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:42:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812799581] [2022-11-20 12:42:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:42:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:42:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:12,508 INFO L87 Difference]: Start difference. First operand 436 states and 589 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:12,646 INFO L93 Difference]: Finished difference Result 459 states and 587 transitions. [2022-11-20 12:42:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:42:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-20 12:42:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:12,648 INFO L225 Difference]: With dead ends: 459 [2022-11-20 12:42:12,649 INFO L226 Difference]: Without dead ends: 459 [2022-11-20 12:42:12,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:42:12,649 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 522 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:12,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 437 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-20 12:42:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2022-11-20 12:42:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4932975871313674) internal successors, (557), 413 states have internal predecessors, (557), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 12:42:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 585 transitions. [2022-11-20 12:42:12,660 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 585 transitions. Word has length 28 [2022-11-20 12:42:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:12,661 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 585 transitions. [2022-11-20 12:42:12,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 585 transitions. [2022-11-20 12:42:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 12:42:12,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:12,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 12:42:12,662 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -43057304, now seen corresponding path program 1 times [2022-11-20 12:42:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:12,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521846816] [2022-11-20 12:42:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:12,802 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 12:42:12,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:12,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521846816] [2022-11-20 12:42:12,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521846816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:12,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:12,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:42:12,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229597512] [2022-11-20 12:42:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:12,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:42:12,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:42:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:12,805 INFO L87 Difference]: Start difference. First operand 434 states and 585 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:12,984 INFO L93 Difference]: Finished difference Result 493 states and 639 transitions. [2022-11-20 12:42:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-20 12:42:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:12,986 INFO L225 Difference]: With dead ends: 493 [2022-11-20 12:42:12,986 INFO L226 Difference]: Without dead ends: 493 [2022-11-20 12:42:12,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:12,987 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 154 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:12,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 520 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:42:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-20 12:42:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 434. [2022-11-20 12:42:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4879356568364612) internal successors, (555), 413 states have internal predecessors, (555), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 12:42:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 583 transitions. [2022-11-20 12:42:12,998 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 583 transitions. Word has length 29 [2022-11-20 12:42:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:12,998 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 583 transitions. [2022-11-20 12:42:12,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 583 transitions. [2022-11-20 12:42:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:42:12,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:12,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:13,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 12:42:13,000 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1334068214, now seen corresponding path program 1 times [2022-11-20 12:42:13,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:13,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064287118] [2022-11-20 12:42:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:13,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:13,392 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 12:42:13,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064287118] [2022-11-20 12:42:13,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064287118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:13,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:42:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600043012] [2022-11-20 12:42:13,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:42:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:42:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:13,396 INFO L87 Difference]: Start difference. First operand 434 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:13,689 INFO L93 Difference]: Finished difference Result 475 states and 613 transitions. [2022-11-20 12:42:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-20 12:42:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:13,691 INFO L225 Difference]: With dead ends: 475 [2022-11-20 12:42:13,692 INFO L226 Difference]: Without dead ends: 475 [2022-11-20 12:42:13,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:42:13,692 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:13,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 657 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-20 12:42:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2022-11-20 12:42:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 367 states have (on average 1.4741144414168936) internal successors, (541), 407 states have internal predecessors, (541), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-20 12:42:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2022-11-20 12:42:13,703 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 30 [2022-11-20 12:42:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:13,703 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2022-11-20 12:42:13,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2022-11-20 12:42:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:42:13,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:13,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:13,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 12:42:13,705 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1334776215, now seen corresponding path program 1 times [2022-11-20 12:42:13,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:13,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673774203] [2022-11-20 12:42:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:13,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:13,891 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 12:42:13,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673774203] [2022-11-20 12:42:13,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673774203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:13,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:13,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:42:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805777531] [2022-11-20 12:42:13,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:13,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:42:13,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:42:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:13,894 INFO L87 Difference]: Start difference. First operand 428 states and 569 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:14,125 INFO L93 Difference]: Finished difference Result 534 states and 690 transitions. [2022-11-20 12:42:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:42:14,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-20 12:42:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:14,127 INFO L225 Difference]: With dead ends: 534 [2022-11-20 12:42:14,127 INFO L226 Difference]: Without dead ends: 534 [2022-11-20 12:42:14,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:14,128 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 147 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:14,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 473 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-20 12:42:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 468. [2022-11-20 12:42:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 1.4678217821782178) internal successors, (593), 445 states have internal predecessors, (593), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 12:42:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 625 transitions. [2022-11-20 12:42:14,179 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 625 transitions. Word has length 30 [2022-11-20 12:42:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:14,180 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 625 transitions. [2022-11-20 12:42:14,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 625 transitions. [2022-11-20 12:42:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:42:14,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:14,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 12:42:14,181 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2022-11-20 12:42:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:14,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524858405] [2022-11-20 12:42:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:14,475 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 12:42:14,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:14,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524858405] [2022-11-20 12:42:14,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524858405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:14,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:14,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:42:14,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065590393] [2022-11-20 12:42:14,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:14,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:42:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:42:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:42:14,478 INFO L87 Difference]: Start difference. First operand 468 states and 625 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:14,870 INFO L93 Difference]: Finished difference Result 555 states and 683 transitions. [2022-11-20 12:42:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:42:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-20 12:42:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:14,873 INFO L225 Difference]: With dead ends: 555 [2022-11-20 12:42:14,873 INFO L226 Difference]: Without dead ends: 555 [2022-11-20 12:42:14,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:42:14,874 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 802 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:14,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 344 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-20 12:42:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 469. [2022-11-20 12:42:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 406 states have (on average 1.458128078817734) internal successors, (592), 445 states have internal predecessors, (592), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-20 12:42:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 626 transitions. [2022-11-20 12:42:14,890 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 626 transitions. Word has length 30 [2022-11-20 12:42:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:14,891 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 626 transitions. [2022-11-20 12:42:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 626 transitions. [2022-11-20 12:42:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 12:42:14,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:14,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 12:42:14,892 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285643, now seen corresponding path program 1 times [2022-11-20 12:42:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138262736] [2022-11-20 12:42:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:15,157 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 12:42:15,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138262736] [2022-11-20 12:42:15,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138262736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:15,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:15,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:42:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093129688] [2022-11-20 12:42:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:15,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:42:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:42:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:15,160 INFO L87 Difference]: Start difference. First operand 469 states and 626 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:15,773 INFO L93 Difference]: Finished difference Result 893 states and 1179 transitions. [2022-11-20 12:42:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:42:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-11-20 12:42:15,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:15,777 INFO L225 Difference]: With dead ends: 893 [2022-11-20 12:42:15,778 INFO L226 Difference]: Without dead ends: 893 [2022-11-20 12:42:15,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:42:15,779 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 340 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:15,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 754 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:42:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-20 12:42:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 544. [2022-11-20 12:42:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 475 states have (on average 1.4442105263157894) internal successors, (686), 516 states have internal predecessors, (686), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-20 12:42:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2022-11-20 12:42:15,798 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 32 [2022-11-20 12:42:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:15,798 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2022-11-20 12:42:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2022-11-20 12:42:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 12:42:15,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:15,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:15,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 12:42:15,800 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2022-11-20 12:42:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635290417] [2022-11-20 12:42:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 12:42:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:15,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635290417] [2022-11-20 12:42:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635290417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868871468] [2022-11-20 12:42:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:15,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:15,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:42:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:42:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:42:16,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:42:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868871468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:16,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:42:16,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:42:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586656865] [2022-11-20 12:42:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:16,036 INFO L87 Difference]: Start difference. First operand 544 states and 728 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:16,060 INFO L93 Difference]: Finished difference Result 553 states and 736 transitions. [2022-11-20 12:42:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-20 12:42:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:16,063 INFO L225 Difference]: With dead ends: 553 [2022-11-20 12:42:16,063 INFO L226 Difference]: Without dead ends: 552 [2022-11-20 12:42:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:42:16,064 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-11-20 12:42:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2022-11-20 12:42:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4384133611691023) internal successors, (689), 520 states have internal predecessors, (689), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-20 12:42:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 731 transitions. [2022-11-20 12:42:16,085 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 731 transitions. Word has length 33 [2022-11-20 12:42:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:16,085 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 731 transitions. [2022-11-20 12:42:16,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 731 transitions. [2022-11-20 12:42:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 12:42:16,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:16,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:16,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:42:16,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:16,292 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2022-11-20 12:42:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868806105] [2022-11-20 12:42:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 12:42:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:42:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868806105] [2022-11-20 12:42:16,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868806105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:16,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:16,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:42:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549669979] [2022-11-20 12:42:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:42:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:42:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:42:16,923 INFO L87 Difference]: Start difference. First operand 548 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:17,783 INFO L93 Difference]: Finished difference Result 555 states and 726 transitions. [2022-11-20 12:42:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:42:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-20 12:42:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:17,785 INFO L225 Difference]: With dead ends: 555 [2022-11-20 12:42:17,785 INFO L226 Difference]: Without dead ends: 553 [2022-11-20 12:42:17,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:42:17,786 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 208 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:17,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 857 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:42:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-20 12:42:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 505. [2022-11-20 12:42:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4328018223234624) internal successors, (629), 479 states have internal predecessors, (629), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 12:42:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 667 transitions. [2022-11-20 12:42:17,801 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 667 transitions. Word has length 33 [2022-11-20 12:42:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:17,801 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 667 transitions. [2022-11-20 12:42:17,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 667 transitions. [2022-11-20 12:42:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 12:42:17,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:17,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 12:42:17,803 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1510785108, now seen corresponding path program 1 times [2022-11-20 12:42:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419798230] [2022-11-20 12:42:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:18,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:18,118 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 12:42:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419798230] [2022-11-20 12:42:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419798230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:18,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:18,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:42:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325161406] [2022-11-20 12:42:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:18,121 INFO L87 Difference]: Start difference. First operand 505 states and 667 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:18,592 INFO L93 Difference]: Finished difference Result 566 states and 708 transitions. [2022-11-20 12:42:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:42:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-20 12:42:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:18,596 INFO L225 Difference]: With dead ends: 566 [2022-11-20 12:42:18,596 INFO L226 Difference]: Without dead ends: 566 [2022-11-20 12:42:18,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:42:18,596 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 405 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:18,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 535 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-20 12:42:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 505. [2022-11-20 12:42:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4214123006833712) internal successors, (624), 479 states have internal predecessors, (624), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 12:42:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 662 transitions. [2022-11-20 12:42:18,614 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 662 transitions. Word has length 33 [2022-11-20 12:42:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:18,614 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 662 transitions. [2022-11-20 12:42:18,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 662 transitions. [2022-11-20 12:42:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:42:18,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:18,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:18,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 12:42:18,617 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2022-11-20 12:42:18,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:18,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113518624] [2022-11-20 12:42:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:18,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:18,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 12:42:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:42:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113518624] [2022-11-20 12:42:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113518624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:18,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:18,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:42:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463862261] [2022-11-20 12:42:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:42:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:42:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:42:18,669 INFO L87 Difference]: Start difference. First operand 505 states and 662 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:18,680 INFO L93 Difference]: Finished difference Result 507 states and 664 transitions. [2022-11-20 12:42:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:42:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-20 12:42:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:18,682 INFO L225 Difference]: With dead ends: 507 [2022-11-20 12:42:18,682 INFO L226 Difference]: Without dead ends: 507 [2022-11-20 12:42:18,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 12:42:18,683 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:18,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-20 12:42:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-11-20 12:42:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 441 states have (on average 1.4195011337868482) internal successors, (626), 481 states have internal predecessors, (626), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 12:42:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 664 transitions. [2022-11-20 12:42:18,694 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 664 transitions. Word has length 41 [2022-11-20 12:42:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:18,694 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 664 transitions. [2022-11-20 12:42:18,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 664 transitions. [2022-11-20 12:42:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:42:18,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:18,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:18,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 12:42:18,696 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2022-11-20 12:42:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:18,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267972403] [2022-11-20 12:42:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:19,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 12:42:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:42:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267972403] [2022-11-20 12:42:19,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267972403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154732207] [2022-11-20 12:42:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:19,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:19,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:42:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:19,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:42:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:19,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:42:20,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:42:20,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-11-20 12:42:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:42:20,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154732207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:42:20,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:42:20,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 23 [2022-11-20 12:42:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22065060] [2022-11-20 12:42:20,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:42:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:42:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:42:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:42:20,326 INFO L87 Difference]: Start difference. First operand 507 states and 664 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:42:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:21,070 INFO L93 Difference]: Finished difference Result 532 states and 664 transitions. [2022-11-20 12:42:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:42:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-11-20 12:42:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:21,073 INFO L225 Difference]: With dead ends: 532 [2022-11-20 12:42:21,073 INFO L226 Difference]: Without dead ends: 532 [2022-11-20 12:42:21,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:42:21,074 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1275 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:21,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 1574 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:42:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-20 12:42:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 504. [2022-11-20 12:42:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 439 states have (on average 1.4123006833712983) internal successors, (620), 479 states have internal predecessors, (620), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 12:42:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 658 transitions. [2022-11-20 12:42:21,085 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 658 transitions. Word has length 41 [2022-11-20 12:42:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:21,086 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 658 transitions. [2022-11-20 12:42:21,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:42:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 658 transitions. [2022-11-20 12:42:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:42:21,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:21,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:21,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 12:42:21,295 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2022-11-20 12:42:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656473227] [2022-11-20 12:42:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:21,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:42:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656473227] [2022-11-20 12:42:21,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656473227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640570023] [2022-11-20 12:42:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:21,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:21,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:21,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:42:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:42:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:21,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:42:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:21,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640570023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:42:21,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:42:21,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-20 12:42:21,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008955075] [2022-11-20 12:42:21,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:42:21,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:42:21,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:42:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:42:21,627 INFO L87 Difference]: Start difference. First operand 504 states and 658 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 12:42:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:21,718 INFO L93 Difference]: Finished difference Result 1164 states and 1506 transitions. [2022-11-20 12:42:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:42:21,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-11-20 12:42:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:21,723 INFO L225 Difference]: With dead ends: 1164 [2022-11-20 12:42:21,723 INFO L226 Difference]: Without dead ends: 1164 [2022-11-20 12:42:21,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:21,724 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 812 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:21,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 722 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-20 12:42:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 666. [2022-11-20 12:42:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 595 states have (on average 1.3647058823529412) internal successors, (812), 635 states have internal predecessors, (812), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-20 12:42:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 862 transitions. [2022-11-20 12:42:21,759 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 862 transitions. Word has length 44 [2022-11-20 12:42:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:21,760 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 862 transitions. [2022-11-20 12:42:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 12:42:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 862 transitions. [2022-11-20 12:42:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:42:21,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:21,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:21,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:21,967 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2022-11-20 12:42:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361664471] [2022-11-20 12:42:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 12:42:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:22,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:22,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361664471] [2022-11-20 12:42:22,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361664471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:22,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807849989] [2022-11-20 12:42:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:22,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:22,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:42:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:42:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:22,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:42:22,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807849989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:22,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:42:22,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-20 12:42:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975988895] [2022-11-20 12:42:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:22,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:22,742 INFO L87 Difference]: Start difference. First operand 666 states and 862 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:23,074 INFO L93 Difference]: Finished difference Result 860 states and 1070 transitions. [2022-11-20 12:42:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-20 12:42:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:23,078 INFO L225 Difference]: With dead ends: 860 [2022-11-20 12:42:23,078 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 12:42:23,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:42:23,079 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 465 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 412 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 12:42:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 663. [2022-11-20 12:42:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 595 states have (on average 1.3512605042016808) internal successors, (804), 632 states have internal predecessors, (804), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-20 12:42:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 854 transitions. [2022-11-20 12:42:23,100 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 854 transitions. Word has length 44 [2022-11-20 12:42:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 854 transitions. [2022-11-20 12:42:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:42:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 854 transitions. [2022-11-20 12:42:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:42:23,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:23,102 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:23,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 12:42:23,315 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:23,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1877190129, now seen corresponding path program 1 times [2022-11-20 12:42:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:23,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362497516] [2022-11-20 12:42:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:23,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:42:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:23,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-20 12:42:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362497516] [2022-11-20 12:42:23,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362497516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367574056] [2022-11-20 12:42:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:23,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:23,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:23,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:42:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:42:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:23,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:42:23,834 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 12:42:23,834 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 12 treesize of output 11 [2022-11-20 12:42:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367574056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:42:23,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:42:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:42:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705795336] [2022-11-20 12:42:23,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:42:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:42:23,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:23,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:42:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:23,868 INFO L87 Difference]: Start difference. First operand 663 states and 854 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:42:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:24,783 INFO L93 Difference]: Finished difference Result 2142 states and 2679 transitions. [2022-11-20 12:42:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:42:24,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-11-20 12:42:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:24,791 INFO L225 Difference]: With dead ends: 2142 [2022-11-20 12:42:24,791 INFO L226 Difference]: Without dead ends: 2142 [2022-11-20 12:42:24,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:42:24,792 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1802 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:24,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1804 Valid, 1030 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:42:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-11-20 12:42:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 851. [2022-11-20 12:42:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 775 states have (on average 1.2967741935483872) internal successors, (1005), 808 states have internal predecessors, (1005), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-20 12:42:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1077 transitions. [2022-11-20 12:42:24,840 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1077 transitions. Word has length 46 [2022-11-20 12:42:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:24,840 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1077 transitions. [2022-11-20 12:42:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:42:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1077 transitions. [2022-11-20 12:42:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:42:24,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:24,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:24,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 12:42:25,048 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2022-11-20 12:42:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210730987] [2022-11-20 12:42:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:25,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210730987] [2022-11-20 12:42:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210730987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:25,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863729642] [2022-11-20 12:42:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:25,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:25,139 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:25,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:42:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:25,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:42:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:25,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:42:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:25,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863729642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:42:25,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:42:25,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2022-11-20 12:42:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247531923] [2022-11-20 12:42:25,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:42:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:25,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:42:25,395 INFO L87 Difference]: Start difference. First operand 851 states and 1077 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:42:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:25,472 INFO L93 Difference]: Finished difference Result 2768 states and 3486 transitions. [2022-11-20 12:42:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:42:25,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-20 12:42:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:25,481 INFO L225 Difference]: With dead ends: 2768 [2022-11-20 12:42:25,481 INFO L226 Difference]: Without dead ends: 2768 [2022-11-20 12:42:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:42:25,482 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 490 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 616 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2022-11-20 12:42:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1928. [2022-11-20 12:42:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1792 states have (on average 1.29296875) internal successors, (2317), 1829 states have internal predecessors, (2317), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:42:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2473 transitions. [2022-11-20 12:42:25,526 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2473 transitions. Word has length 45 [2022-11-20 12:42:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:25,526 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 2473 transitions. [2022-11-20 12:42:25,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:42:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2473 transitions. [2022-11-20 12:42:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:42:25,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:25,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:25,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 12:42:25,734 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2022-11-20 12:42:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851393469] [2022-11-20 12:42:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:26,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:26,224 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 12:42:26,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851393469] [2022-11-20 12:42:26,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851393469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481323470] [2022-11-20 12:42:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:26,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:26,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:26,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:26,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:42:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:42:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:26,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:42:26,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481323470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:26,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:42:26,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-11-20 12:42:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301015901] [2022-11-20 12:42:26,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:42:26,726 INFO L87 Difference]: Start difference. First operand 1928 states and 2473 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:26,965 INFO L93 Difference]: Finished difference Result 1976 states and 2504 transitions. [2022-11-20 12:42:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:42:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:26,972 INFO L225 Difference]: With dead ends: 1976 [2022-11-20 12:42:26,972 INFO L226 Difference]: Without dead ends: 1976 [2022-11-20 12:42:26,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:42:26,974 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 454 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:26,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 397 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-20 12:42:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2022-11-20 12:42:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1794 states have (on average 1.2931995540691192) internal successors, (2320), 1831 states have internal predecessors, (2320), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:42:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2476 transitions. [2022-11-20 12:42:27,013 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2476 transitions. Word has length 45 [2022-11-20 12:42:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:27,014 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2476 transitions. [2022-11-20 12:42:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2476 transitions. [2022-11-20 12:42:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:42:27,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:27,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:27,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:27,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 12:42:27,228 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2022-11-20 12:42:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53713860] [2022-11-20 12:42:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:27,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:27,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:27,447 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 12:42:27,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53713860] [2022-11-20 12:42:27,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53713860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007221585] [2022-11-20 12:42:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:27,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:27,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:27,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:42:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:42:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:27,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:42:27,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007221585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:27,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:42:27,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-20 12:42:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869903474] [2022-11-20 12:42:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:42:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:27,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:42:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:42:27,932 INFO L87 Difference]: Start difference. First operand 1930 states and 2476 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:28,131 INFO L93 Difference]: Finished difference Result 1975 states and 2502 transitions. [2022-11-20 12:42:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:42:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:42:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:28,138 INFO L225 Difference]: With dead ends: 1975 [2022-11-20 12:42:28,138 INFO L226 Difference]: Without dead ends: 1975 [2022-11-20 12:42:28,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:42:28,138 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 454 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:28,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 354 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2022-11-20 12:42:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1927. [2022-11-20 12:42:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2918526785714286) internal successors, (2315), 1828 states have internal predecessors, (2315), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:42:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2471 transitions. [2022-11-20 12:42:28,174 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2471 transitions. Word has length 45 [2022-11-20 12:42:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:28,175 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2471 transitions. [2022-11-20 12:42:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2471 transitions. [2022-11-20 12:42:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 12:42:28,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:28,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:28,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 12:42:28,382 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2022-11-20 12:42:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:28,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829648664] [2022-11-20 12:42:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:30,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:30,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829648664] [2022-11-20 12:42:30,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829648664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:30,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:30,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 12:42:30,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355030705] [2022-11-20 12:42:30,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:30,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:42:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:42:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:42:30,251 INFO L87 Difference]: Start difference. First operand 1927 states and 2471 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:31,350 INFO L93 Difference]: Finished difference Result 1976 states and 2523 transitions. [2022-11-20 12:42:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:42:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-20 12:42:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:31,360 INFO L225 Difference]: With dead ends: 1976 [2022-11-20 12:42:31,360 INFO L226 Difference]: Without dead ends: 1976 [2022-11-20 12:42:31,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:42:31,362 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 114 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:31,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 725 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:42:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-20 12:42:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1957. [2022-11-20 12:42:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1822 states have (on average 1.2892425905598244) internal successors, (2349), 1858 states have internal predecessors, (2349), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:42:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2505 transitions. [2022-11-20 12:42:31,403 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2505 transitions. Word has length 48 [2022-11-20 12:42:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:31,403 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2505 transitions. [2022-11-20 12:42:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2505 transitions. [2022-11-20 12:42:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:42:31,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:31,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 12:42:31,405 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2022-11-20 12:42:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:31,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980132164] [2022-11-20 12:42:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:31,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980132164] [2022-11-20 12:42:31,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980132164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:31,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:31,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:42:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234047906] [2022-11-20 12:42:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:31,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:42:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:42:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:42:31,694 INFO L87 Difference]: Start difference. First operand 1957 states and 2505 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:31,985 INFO L93 Difference]: Finished difference Result 2179 states and 2767 transitions. [2022-11-20 12:42:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:42:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-20 12:42:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:31,994 INFO L225 Difference]: With dead ends: 2179 [2022-11-20 12:42:31,994 INFO L226 Difference]: Without dead ends: 2179 [2022-11-20 12:42:31,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:42:31,995 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1235 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:31,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 899 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:42:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-11-20 12:42:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1927. [2022-11-20 12:42:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2756696428571428) internal successors, (2286), 1828 states have internal predecessors, (2286), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-20 12:42:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2442 transitions. [2022-11-20 12:42:32,051 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2442 transitions. Word has length 49 [2022-11-20 12:42:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:32,052 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2442 transitions. [2022-11-20 12:42:32,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2442 transitions. [2022-11-20 12:42:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:42:32,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:32,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-20 12:42:32,054 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2022-11-20 12:42:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538993359] [2022-11-20 12:42:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:32,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:33,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538993359] [2022-11-20 12:42:33,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538993359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:33,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:33,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 12:42:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672684230] [2022-11-20 12:42:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:42:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:42:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:42:33,057 INFO L87 Difference]: Start difference. First operand 1927 states and 2442 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:34,209 INFO L93 Difference]: Finished difference Result 2078 states and 2605 transitions. [2022-11-20 12:42:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:42:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-20 12:42:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:34,215 INFO L225 Difference]: With dead ends: 2078 [2022-11-20 12:42:34,215 INFO L226 Difference]: Without dead ends: 2078 [2022-11-20 12:42:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:42:34,216 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1321 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:34,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 1034 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:42:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-20 12:42:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1796. [2022-11-20 12:42:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1664 states have (on average 1.28125) internal successors, (2132), 1699 states have internal predecessors, (2132), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-20 12:42:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2278 transitions. [2022-11-20 12:42:34,255 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2278 transitions. Word has length 49 [2022-11-20 12:42:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:34,255 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2278 transitions. [2022-11-20 12:42:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2278 transitions. [2022-11-20 12:42:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:42:34,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:34,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:34,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-20 12:42:34,257 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225817, now seen corresponding path program 1 times [2022-11-20 12:42:34,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:34,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539670119] [2022-11-20 12:42:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:34,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:35,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539670119] [2022-11-20 12:42:35,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539670119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:35,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:35,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 12:42:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810703744] [2022-11-20 12:42:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:42:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:42:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:42:35,624 INFO L87 Difference]: Start difference. First operand 1796 states and 2278 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:38,239 INFO L93 Difference]: Finished difference Result 2635 states and 3366 transitions. [2022-11-20 12:42:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:42:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-20 12:42:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:38,246 INFO L225 Difference]: With dead ends: 2635 [2022-11-20 12:42:38,246 INFO L226 Difference]: Without dead ends: 2635 [2022-11-20 12:42:38,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:42:38,247 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2288 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2288 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:38,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2288 Valid, 1262 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:42:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-20 12:42:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2000. [2022-11-20 12:42:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1852 states have (on average 1.2975161987041037) internal successors, (2403), 1891 states have internal predecessors, (2403), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-20 12:42:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2569 transitions. [2022-11-20 12:42:38,302 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2569 transitions. Word has length 49 [2022-11-20 12:42:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:38,302 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2569 transitions. [2022-11-20 12:42:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2569 transitions. [2022-11-20 12:42:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:42:38,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:38,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-20 12:42:38,305 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072858, now seen corresponding path program 1 times [2022-11-20 12:42:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199616377] [2022-11-20 12:42:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:38,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199616377] [2022-11-20 12:42:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199616377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:38,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:38,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:42:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794311579] [2022-11-20 12:42:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:38,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:42:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:42:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:38,793 INFO L87 Difference]: Start difference. First operand 2000 states and 2569 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:39,565 INFO L93 Difference]: Finished difference Result 2610 states and 3303 transitions. [2022-11-20 12:42:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:42:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-20 12:42:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:39,571 INFO L225 Difference]: With dead ends: 2610 [2022-11-20 12:42:39,571 INFO L226 Difference]: Without dead ends: 2610 [2022-11-20 12:42:39,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:42:39,572 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 943 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:39,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1168 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:42:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2022-11-20 12:42:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2254. [2022-11-20 12:42:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2074 states have (on average 1.2974927675988428) internal successors, (2691), 2133 states have internal predecessors, (2691), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2022-11-20 12:42:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2909 transitions. [2022-11-20 12:42:39,636 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2909 transitions. Word has length 49 [2022-11-20 12:42:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:39,636 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2909 transitions. [2022-11-20 12:42:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2909 transitions. [2022-11-20 12:42:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:42:39,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:39,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:39,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-20 12:42:39,639 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072859, now seen corresponding path program 1 times [2022-11-20 12:42:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:39,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661706524] [2022-11-20 12:42:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661706524] [2022-11-20 12:42:40,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661706524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:40,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:42:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:42:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343093090] [2022-11-20 12:42:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:42:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:42:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:42:40,334 INFO L87 Difference]: Start difference. First operand 2254 states and 2909 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:41,099 INFO L93 Difference]: Finished difference Result 2745 states and 3475 transitions. [2022-11-20 12:42:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:42:41,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-20 12:42:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:41,106 INFO L225 Difference]: With dead ends: 2745 [2022-11-20 12:42:41,106 INFO L226 Difference]: Without dead ends: 2745 [2022-11-20 12:42:41,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:42:41,111 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 957 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:41,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 883 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:42:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-20 12:42:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2447. [2022-11-20 12:42:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2251 states have (on average 1.3091959129275876) internal successors, (2947), 2314 states have internal predecessors, (2947), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-20 12:42:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3185 transitions. [2022-11-20 12:42:41,170 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3185 transitions. Word has length 49 [2022-11-20 12:42:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:41,171 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3185 transitions. [2022-11-20 12:42:41,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3185 transitions. [2022-11-20 12:42:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 12:42:41,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:41,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:41,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-20 12:42:41,173 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -7673948, now seen corresponding path program 1 times [2022-11-20 12:42:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696497149] [2022-11-20 12:42:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:41,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:41,235 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 12:42:41,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696497149] [2022-11-20 12:42:41,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696497149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802403484] [2022-11-20 12:42:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:41,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:41,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:41,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:42:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:42:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:42:41,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:42:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802403484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:42:41,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:42:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-20 12:42:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47241455] [2022-11-20 12:42:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:42:41,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:42:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:42:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:42:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:41,467 INFO L87 Difference]: Start difference. First operand 2447 states and 3185 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:42:41,498 INFO L93 Difference]: Finished difference Result 2964 states and 3885 transitions. [2022-11-20 12:42:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:42:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-20 12:42:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:42:41,504 INFO L225 Difference]: With dead ends: 2964 [2022-11-20 12:42:41,504 INFO L226 Difference]: Without dead ends: 2964 [2022-11-20 12:42:41,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:42:41,507 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 200 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:42:41,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 318 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:42:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2022-11-20 12:42:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2870. [2022-11-20 12:42:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2662 states have (on average 1.3260706235912847) internal successors, (3530), 2725 states have internal predecessors, (3530), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-20 12:42:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3792 transitions. [2022-11-20 12:42:41,554 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3792 transitions. Word has length 50 [2022-11-20 12:42:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:42:41,555 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3792 transitions. [2022-11-20 12:42:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:42:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3792 transitions. [2022-11-20 12:42:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 12:42:41,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:42:41,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:42:41,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:42:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 12:42:41,768 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:42:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:42:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -384530648, now seen corresponding path program 1 times [2022-11-20 12:42:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:42:41,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259960320] [2022-11-20 12:42:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:42:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:43,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:42:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:42:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:42:43,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:42:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259960320] [2022-11-20 12:42:43,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259960320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:42:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520714105] [2022-11-20 12:42:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:42:43,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:42:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:42:43,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:42:43,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:42:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:42:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 12:42:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:42:43,888 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:42:43,888 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 12:42:44,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:42:44,479 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 12:42:44,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 12:42:44,498 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:42:44,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:42:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:42:44,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:42:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:42:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:42:44,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2022-11-20 12:42:45,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:42:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:42:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:42:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:42:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:42:45,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:42:45,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-11-20 12:42:45,746 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 12:42:45,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:43:10,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520714105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:10,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:43:10,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-20 12:43:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847024863] [2022-11-20 12:43:10,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:43:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:43:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:43:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2383, Unknown=7, NotChecked=0, Total=2550 [2022-11-20 12:43:10,030 INFO L87 Difference]: Start difference. First operand 2870 states and 3792 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:43:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:21,563 INFO L93 Difference]: Finished difference Result 3280 states and 4241 transitions. [2022-11-20 12:43:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 12:43:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2022-11-20 12:43:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:21,570 INFO L225 Difference]: With dead ends: 3280 [2022-11-20 12:43:21,570 INFO L226 Difference]: Without dead ends: 3276 [2022-11-20 12:43:21,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1342, Invalid=8157, Unknown=7, NotChecked=0, Total=9506 [2022-11-20 12:43:21,573 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2345 mSDsluCounter, 4455 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 4622 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:21,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2345 Valid, 4622 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2696 Invalid, 0 Unknown, 200 Unchecked, 2.7s Time] [2022-11-20 12:43:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2022-11-20 12:43:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2864. [2022-11-20 12:43:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2656 states have (on average 1.3226656626506024) internal successors, (3513), 2718 states have internal predecessors, (3513), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 94 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-20 12:43:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3775 transitions. [2022-11-20 12:43:21,624 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3775 transitions. Word has length 51 [2022-11-20 12:43:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:21,625 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3775 transitions. [2022-11-20 12:43:21,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:43:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3775 transitions. [2022-11-20 12:43:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 12:43:21,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:21,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:21,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:43:21,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:21,832 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash -987996839, now seen corresponding path program 1 times [2022-11-20 12:43:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081930441] [2022-11-20 12:43:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:21,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:43:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:21,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:21,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081930441] [2022-11-20 12:43:21,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081930441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:43:21,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:43:21,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:43:21,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337018727] [2022-11-20 12:43:21,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:43:21,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:43:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:43:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:43:21,949 INFO L87 Difference]: Start difference. First operand 2864 states and 3775 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:21,979 INFO L93 Difference]: Finished difference Result 3639 states and 4858 transitions. [2022-11-20 12:43:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:43:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-20 12:43:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:21,992 INFO L225 Difference]: With dead ends: 3639 [2022-11-20 12:43:21,993 INFO L226 Difference]: Without dead ends: 3639 [2022-11-20 12:43:21,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:43:21,994 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 117 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:21,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 441 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:43:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-11-20 12:43:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2490. [2022-11-20 12:43:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2306 states have (on average 1.303122289679098) internal successors, (3005), 2364 states have internal predecessors, (3005), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 12:43:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3237 transitions. [2022-11-20 12:43:22,047 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3237 transitions. Word has length 51 [2022-11-20 12:43:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:22,047 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3237 transitions. [2022-11-20 12:43:22,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3237 transitions. [2022-11-20 12:43:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 12:43:22,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:22,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-20 12:43:22,049 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1781712484, now seen corresponding path program 1 times [2022-11-20 12:43:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959364262] [2022-11-20 12:43:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:43:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:22,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:22,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959364262] [2022-11-20 12:43:22,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959364262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:22,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272419113] [2022-11-20 12:43:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:22,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:22,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:43:22,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:43:22,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:43:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:43:22,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:43:22,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 12:43:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:43:22,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:43:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:43:23,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272419113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:43:23,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:43:23,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2022-11-20 12:43:23,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043548502] [2022-11-20 12:43:23,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:43:23,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:43:23,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:23,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:43:23,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:43:23,160 INFO L87 Difference]: Start difference. First operand 2490 states and 3237 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:43:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:24,314 INFO L93 Difference]: Finished difference Result 3674 states and 4798 transitions. [2022-11-20 12:43:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:43:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-11-20 12:43:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:24,349 INFO L225 Difference]: With dead ends: 3674 [2022-11-20 12:43:24,350 INFO L226 Difference]: Without dead ends: 3666 [2022-11-20 12:43:24,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:43:24,352 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 590 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:24,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1639 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:43:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2022-11-20 12:43:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2502. [2022-11-20 12:43:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2318 states have (on average 1.3002588438308886) internal successors, (3014), 2376 states have internal predecessors, (3014), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 12:43:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3246 transitions. [2022-11-20 12:43:24,400 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3246 transitions. Word has length 52 [2022-11-20 12:43:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:24,400 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3246 transitions. [2022-11-20 12:43:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:43:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3246 transitions. [2022-11-20 12:43:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 12:43:24,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:24,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:24,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:43:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:24,609 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1216726984, now seen corresponding path program 1 times [2022-11-20 12:43:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543604359] [2022-11-20 12:43:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:43:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:25,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543604359] [2022-11-20 12:43:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543604359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:43:25,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:43:25,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 12:43:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917226364] [2022-11-20 12:43:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:43:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:43:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:43:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:43:25,484 INFO L87 Difference]: Start difference. First operand 2502 states and 3246 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:26,575 INFO L93 Difference]: Finished difference Result 2673 states and 3431 transitions. [2022-11-20 12:43:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:43:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-20 12:43:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:26,581 INFO L225 Difference]: With dead ends: 2673 [2022-11-20 12:43:26,582 INFO L226 Difference]: Without dead ends: 2673 [2022-11-20 12:43:26,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:43:26,583 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1107 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:26,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 973 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:43:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-11-20 12:43:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2516. [2022-11-20 12:43:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2332 states have (on average 1.300171526586621) internal successors, (3032), 2390 states have internal predecessors, (3032), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 12:43:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3264 transitions. [2022-11-20 12:43:26,628 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3264 transitions. Word has length 52 [2022-11-20 12:43:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3264 transitions. [2022-11-20 12:43:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3264 transitions. [2022-11-20 12:43:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 12:43:26,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:26,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:26,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 12:43:26,631 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash 407380358, now seen corresponding path program 1 times [2022-11-20 12:43:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:26,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639543167] [2022-11-20 12:43:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:43:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639543167] [2022-11-20 12:43:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639543167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:43:27,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:43:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:43:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736519474] [2022-11-20 12:43:27,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:43:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:43:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:43:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:43:27,159 INFO L87 Difference]: Start difference. First operand 2516 states and 3264 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:27,999 INFO L93 Difference]: Finished difference Result 2880 states and 3681 transitions. [2022-11-20 12:43:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:43:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-20 12:43:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:28,004 INFO L225 Difference]: With dead ends: 2880 [2022-11-20 12:43:28,004 INFO L226 Difference]: Without dead ends: 2880 [2022-11-20 12:43:28,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:43:28,005 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 930 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:28,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1022 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:43:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-11-20 12:43:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2503. [2022-11-20 12:43:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2319 states have (on average 1.3001293661060802) internal successors, (3015), 2377 states have internal predecessors, (3015), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 12:43:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3247 transitions. [2022-11-20 12:43:28,049 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3247 transitions. Word has length 52 [2022-11-20 12:43:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 2503 states and 3247 transitions. [2022-11-20 12:43:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:43:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3247 transitions. [2022-11-20 12:43:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 12:43:28,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:28,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:28,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-20 12:43:28,052 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash -159124908, now seen corresponding path program 1 times [2022-11-20 12:43:28,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:28,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427378154] [2022-11-20 12:43:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:43:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:28,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:43:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:43:28,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:28,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427378154] [2022-11-20 12:43:28,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427378154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:28,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701178446] [2022-11-20 12:43:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:28,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:28,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:43:28,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:43:28,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:43:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:28,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:43:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:43:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:28,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:43:28,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701178446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:43:28,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:43:28,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2022-11-20 12:43:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242417818] [2022-11-20 12:43:28,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:43:28,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:43:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:28,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:43:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:43:28,995 INFO L87 Difference]: Start difference. First operand 2503 states and 3247 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:43:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:29,580 INFO L93 Difference]: Finished difference Result 2911 states and 3718 transitions. [2022-11-20 12:43:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:43:29,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-11-20 12:43:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:29,586 INFO L225 Difference]: With dead ends: 2911 [2022-11-20 12:43:29,586 INFO L226 Difference]: Without dead ends: 2911 [2022-11-20 12:43:29,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:43:29,587 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 655 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:29,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 405 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:43:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-11-20 12:43:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2501. [2022-11-20 12:43:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2319 states have (on average 1.2923673997412677) internal successors, (2997), 2375 states have internal predecessors, (2997), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-20 12:43:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3229 transitions. [2022-11-20 12:43:29,629 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3229 transitions. Word has length 53 [2022-11-20 12:43:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 3229 transitions. [2022-11-20 12:43:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:43:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3229 transitions. [2022-11-20 12:43:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 12:43:29,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:29,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:29,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:43:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:29,837 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489697, now seen corresponding path program 1 times [2022-11-20 12:43:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475849235] [2022-11-20 12:43:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:30,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:43:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:43:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:43:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:31,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475849235] [2022-11-20 12:43:31,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475849235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:31,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248241366] [2022-11-20 12:43:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:43:31,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:43:31,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:43:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 12:43:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:43:31,487 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:43:31,487 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 21 [2022-11-20 12:43:31,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:31,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:31,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:31,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:31,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:31,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:32,149 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:43:32,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:43:32,177 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:43:32,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:43:32,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:32,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-20 12:43:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:43:32,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-20 12:43:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:33,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-11-20 12:43:33,144 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 12:43:33,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 12:43:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:33,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:43:33,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248241366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:33,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:43:33,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2022-11-20 12:43:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894020733] [2022-11-20 12:43:33,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:43:33,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 12:43:33,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 12:43:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:43:33,606 INFO L87 Difference]: Start difference. First operand 2501 states and 3229 transitions. Second operand has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:43:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:43:38,538 INFO L93 Difference]: Finished difference Result 4064 states and 5287 transitions. [2022-11-20 12:43:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 12:43:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2022-11-20 12:43:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:43:38,546 INFO L225 Difference]: With dead ends: 4064 [2022-11-20 12:43:38,546 INFO L226 Difference]: Without dead ends: 4064 [2022-11-20 12:43:38,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=979, Invalid=5183, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 12:43:38,548 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2840 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2844 SdHoareTripleChecker+Valid, 3071 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:43:38,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2844 Valid, 3071 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1948 Invalid, 0 Unknown, 344 Unchecked, 1.9s Time] [2022-11-20 12:43:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-11-20 12:43:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2637. [2022-11-20 12:43:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2445 states have (on average 1.2834355828220858) internal successors, (3138), 2505 states have internal predecessors, (3138), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 87 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-20 12:43:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3386 transitions. [2022-11-20 12:43:38,615 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3386 transitions. Word has length 53 [2022-11-20 12:43:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:43:38,615 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3386 transitions. [2022-11-20 12:43:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:43:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3386 transitions. [2022-11-20 12:43:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 12:43:38,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:43:38,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:43:38,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 12:43:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:38,826 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:43:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:43:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489696, now seen corresponding path program 1 times [2022-11-20 12:43:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:43:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433347254] [2022-11-20 12:43:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:38,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:43:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:40,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:43:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:43:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:43:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:43:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433347254] [2022-11-20 12:43:40,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433347254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443618391] [2022-11-20 12:43:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:43:40,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:43:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:43:40,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:43:40,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:43:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:43:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 12:43:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:43:41,550 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:43:41,550 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 21 [2022-11-20 12:43:41,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:43:41,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:41,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:41,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:41,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:41,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:41,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:43:42,480 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:43:42,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:43:42,507 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 12:43:42,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:43:43,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:43:43,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2022-11-20 12:43:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:43:43,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:43:43,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:43,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 12:43:43,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:43:43,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2022-11-20 12:43:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:43:44,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:43:44,031 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-20 12:43:44,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:43:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:43:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:43:52,949 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:43:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443618391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:43:53,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:43:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 36 [2022-11-20 12:43:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245745825] [2022-11-20 12:43:53,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:43:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:43:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:43:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:43:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:43:53,108 INFO L87 Difference]: Start difference. First operand 2637 states and 3386 transitions. Second operand has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:44:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:06,614 INFO L93 Difference]: Finished difference Result 5255 states and 6918 transitions. [2022-11-20 12:44:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 12:44:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2022-11-20 12:44:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:06,624 INFO L225 Difference]: With dead ends: 5255 [2022-11-20 12:44:06,624 INFO L226 Difference]: Without dead ends: 5255 [2022-11-20 12:44:06,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1564, Invalid=8536, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 12:44:06,627 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 3709 mSDsluCounter, 4832 mSDsCounter, 0 mSdLazyCounter, 4043 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 5093 SdHoareTripleChecker+Invalid, 4706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:06,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 5093 Invalid, 4706 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [216 Valid, 4043 Invalid, 0 Unknown, 447 Unchecked, 4.7s Time] [2022-11-20 12:44:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2022-11-20 12:44:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 2685. [2022-11-20 12:44:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2493 states have (on average 1.2691536301644606) internal successors, (3164), 2549 states have internal predecessors, (3164), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 91 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-20 12:44:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3412 transitions. [2022-11-20 12:44:06,705 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3412 transitions. Word has length 53 [2022-11-20 12:44:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:06,706 INFO L495 AbstractCegarLoop]: Abstraction has 2685 states and 3412 transitions. [2022-11-20 12:44:06,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:44:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3412 transitions. [2022-11-20 12:44:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 12:44:06,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:06,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:06,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:06,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-20 12:44:06,922 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:44:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2096673869, now seen corresponding path program 1 times [2022-11-20 12:44:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:06,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979979655] [2022-11-20 12:44:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:07,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 12:44:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:07,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-20 12:44:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:44:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979979655] [2022-11-20 12:44:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979979655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723881859] [2022-11-20 12:44:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:07,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:07,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:07,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:07,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:44:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:44:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:07,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:44:07,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:44:07,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:44:07,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:44:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:44:07,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:44:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723881859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:07,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:44:07,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-11-20 12:44:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3418296] [2022-11-20 12:44:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:44:07,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:44:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:44:07,788 INFO L87 Difference]: Start difference. First operand 2685 states and 3412 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:08,385 INFO L93 Difference]: Finished difference Result 2540 states and 3177 transitions. [2022-11-20 12:44:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:44:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-11-20 12:44:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:08,390 INFO L225 Difference]: With dead ends: 2540 [2022-11-20 12:44:08,390 INFO L226 Difference]: Without dead ends: 2540 [2022-11-20 12:44:08,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:44:08,391 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 222 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:08,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1017 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:44:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-20 12:44:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2130. [2022-11-20 12:44:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1978 states have (on average 1.2553083923154702) internal successors, (2483), 2024 states have internal predecessors, (2483), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 76 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-20 12:44:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2681 transitions. [2022-11-20 12:44:08,436 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2681 transitions. Word has length 54 [2022-11-20 12:44:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:08,436 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2681 transitions. [2022-11-20 12:44:08,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2681 transitions. [2022-11-20 12:44:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 12:44:08,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:08,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:08,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 12:44:08,645 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:44:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2010110243, now seen corresponding path program 1 times [2022-11-20 12:44:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:08,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097357143] [2022-11-20 12:44:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:08,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:44:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097357143] [2022-11-20 12:44:08,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097357143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097337952] [2022-11-20 12:44:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:08,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:08,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:44:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:08,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:44:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:09,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097337952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:09,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:09,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-20 12:44:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954126849] [2022-11-20 12:44:09,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:09,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:44:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:44:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:44:09,203 INFO L87 Difference]: Start difference. First operand 2130 states and 2681 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:09,267 INFO L93 Difference]: Finished difference Result 4141 states and 5286 transitions. [2022-11-20 12:44:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:44:09,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-20 12:44:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:09,274 INFO L225 Difference]: With dead ends: 4141 [2022-11-20 12:44:09,274 INFO L226 Difference]: Without dead ends: 4141 [2022-11-20 12:44:09,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:44:09,275 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 268 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:09,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 614 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2022-11-20 12:44:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3226. [2022-11-20 12:44:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3026 states have (on average 1.2785855915399869) internal successors, (3869), 3078 states have internal predecessors, (3869), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-20 12:44:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4163 transitions. [2022-11-20 12:44:09,349 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4163 transitions. Word has length 55 [2022-11-20 12:44:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:09,350 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4163 transitions. [2022-11-20 12:44:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4163 transitions. [2022-11-20 12:44:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 12:44:09,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:09,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:09,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:09,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 12:44:09,564 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:44:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2111090623, now seen corresponding path program 1 times [2022-11-20 12:44:09,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428647305] [2022-11-20 12:44:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:09,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:10,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:44:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428647305] [2022-11-20 12:44:10,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428647305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241773576] [2022-11-20 12:44:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:10,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:10,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:10,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:10,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:44:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 12:44:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:11,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:44:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:44:11,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-20 12:44:12,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2022-11-20 12:44:12,333 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 13 treesize of output 9 [2022-11-20 12:44:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:12,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:12,524 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1324 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1324)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-20 12:44:12,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2022-11-20 12:46:15,297 WARN L233 SmtUtils]: Spent 2.04m on a formula simplification. DAG size of input: 71 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:46:59,527 WARN L233 SmtUtils]: Spent 40.10s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:47:45,806 WARN L233 SmtUtils]: Spent 40.12s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:48:36,119 WARN L233 SmtUtils]: Spent 42.11s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:49:00,823 WARN L233 SmtUtils]: Spent 24.09s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:49:09,091 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:49:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241773576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:11,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:49:11,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-11-20 12:49:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851232023] [2022-11-20 12:49:11,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 12:49:11,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 12:49:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1384, Unknown=11, NotChecked=76, Total=1640 [2022-11-20 12:49:11,232 INFO L87 Difference]: Start difference. First operand 3226 states and 4163 transitions. Second operand has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:49:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:12,008 INFO L93 Difference]: Finished difference Result 3241 states and 4178 transitions. [2022-11-20 12:49:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:49:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-11-20 12:49:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:12,015 INFO L225 Difference]: With dead ends: 3241 [2022-11-20 12:49:12,015 INFO L226 Difference]: Without dead ends: 3230 [2022-11-20 12:49:12,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 298.8s TimeCoverageRelationStatistics Valid=204, Invalid=1595, Unknown=11, NotChecked=82, Total=1892 [2022-11-20 12:49:12,016 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:12,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1463 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 268 Unchecked, 0.5s Time] [2022-11-20 12:49:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2022-11-20 12:49:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3229. [2022-11-20 12:49:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3029 states have (on average 1.2783096731594585) internal successors, (3872), 3081 states have internal predecessors, (3872), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-20 12:49:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 4166 transitions. [2022-11-20 12:49:12,075 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 4166 transitions. Word has length 56 [2022-11-20 12:49:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:12,076 INFO L495 AbstractCegarLoop]: Abstraction has 3229 states and 4166 transitions. [2022-11-20 12:49:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 29 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:49:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 4166 transitions. [2022-11-20 12:49:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 12:49:12,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:12,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:12,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 12:49:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:12,286 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:49:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1925711235, now seen corresponding path program 1 times [2022-11-20 12:49:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397419446] [2022-11-20 12:49:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:49:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:13,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397419446] [2022-11-20 12:49:13,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397419446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234598545] [2022-11-20 12:49:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:13,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:13,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:49:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:13,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:49:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:14,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:49:14,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:49:14,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-11-20 12:49:14,704 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 13 treesize of output 9 [2022-11-20 12:49:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:14,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:14,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-11-20 12:49:23,112 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 30 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:49:37,595 WARN L233 SmtUtils]: Spent 6.04s 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 12:49:48,305 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:49:48,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234598545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:48,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:49:48,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-20 12:49:48,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783620757] [2022-11-20 12:49:48,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:48,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:49:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:49:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:49:48,344 INFO L87 Difference]: Start difference. First operand 3229 states and 4166 transitions. Second operand has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:49:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:49,289 INFO L93 Difference]: Finished difference Result 3240 states and 4176 transitions. [2022-11-20 12:49:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:49:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-11-20 12:49:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:49,295 INFO L225 Difference]: With dead ends: 3240 [2022-11-20 12:49:49,295 INFO L226 Difference]: Without dead ends: 3226 [2022-11-20 12:49:49,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:49:49,296 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 156 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1368 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2022-11-20 12:49:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2022-11-20 12:49:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 3223. [2022-11-20 12:49:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3023 states have (on average 1.2778696658948066) internal successors, (3863), 3075 states have internal predecessors, (3863), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-20 12:49:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4157 transitions. [2022-11-20 12:49:49,357 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4157 transitions. Word has length 56 [2022-11-20 12:49:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:49,357 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4157 transitions. [2022-11-20 12:49:49,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:49:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4157 transitions. [2022-11-20 12:49:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 12:49:49,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:49,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:49,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:49,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 12:49:49,567 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:49:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1410137754, now seen corresponding path program 1 times [2022-11-20 12:49:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:49,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767932045] [2022-11-20 12:49:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:49:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:50,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:49:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:49:50,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767932045] [2022-11-20 12:49:50,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767932045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:50,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:50,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 12:49:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887362302] [2022-11-20 12:49:50,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:49:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:49:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:49:50,781 INFO L87 Difference]: Start difference. First operand 3223 states and 4157 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:49:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:52,807 INFO L93 Difference]: Finished difference Result 4234 states and 5461 transitions. [2022-11-20 12:49:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:49:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-11-20 12:49:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:52,815 INFO L225 Difference]: With dead ends: 4234 [2022-11-20 12:49:52,816 INFO L226 Difference]: Without dead ends: 4234 [2022-11-20 12:49:52,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:49:52,823 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 1167 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:52,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 1416 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:49:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2022-11-20 12:49:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 3792. [2022-11-20 12:49:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3560 states have (on average 1.2797752808988765) internal successors, (4556), 3619 states have internal predecessors, (4556), 174 states have call successors, (174), 34 states have call predecessors, (174), 34 states have return successors, (174), 138 states have call predecessors, (174), 174 states have call successors, (174) [2022-11-20 12:49:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 4904 transitions. [2022-11-20 12:49:52,906 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 4904 transitions. Word has length 57 [2022-11-20 12:49:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:52,907 INFO L495 AbstractCegarLoop]: Abstraction has 3792 states and 4904 transitions. [2022-11-20 12:49:52,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:49:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 4904 transitions. [2022-11-20 12:49:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:49:52,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:52,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-20 12:49:52,909 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:49:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash 765305624, now seen corresponding path program 1 times [2022-11-20 12:49:52,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:52,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724945519] [2022-11-20 12:49:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:52,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:56,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:49:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:56,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:49:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:49:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:56,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724945519] [2022-11-20 12:49:56,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724945519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272641761] [2022-11-20 12:49:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:56,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:56,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:49:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 12:49:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:56,860 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:49:56,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:49:57,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:49:57,760 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:49:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:49:57,783 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 12:49:57,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:49:57,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:49:58,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:49:58,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 124 [2022-11-20 12:49:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:49:58,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:49:58,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 35 [2022-11-20 12:49:59,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:49:59,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-11-20 12:49:59,621 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 12:49:59,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:10,749 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse3 (+ |c_~#list~0.offset| .cse8)) (.cse4 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse8)) (.cse2 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1498 (Array Int Int)) (v_ArrVal_1503 Int) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1498))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (= (select |c_#valid| (select (select (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse2 v_ArrVal_1503)) |c_~#list~0.base|) .cse3)) 1) (= (select .cse1 .cse4) 0) (not (= 0 (select .cse1 .cse2))))))) (forall ((v_ArrVal_1498 (Array Int Int)) (v_ArrVal_1497 (Array Int Int)) (v_ArrVal_1503 Int) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1498)) (.cse7 (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|))) (let ((.cse6 (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) .cse7 |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (= (select |c_#valid| (select (select (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse6 .cse2 v_ArrVal_1503)) |c_~#list~0.base|) .cse3)) 1) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1497) |c_ULTIMATE.start_append_one_~list#1.base|) .cse7 |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse4) 0) (not (= 0 (select .cse6 .cse2)))))))))) is different from false [2022-11-20 12:50:11,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272641761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:11,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:50:11,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 38 [2022-11-20 12:50:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379628749] [2022-11-20 12:50:11,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:50:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:50:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2741, Unknown=6, NotChecked=106, Total=3080 [2022-11-20 12:50:11,928 INFO L87 Difference]: Start difference. First operand 3792 states and 4904 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:50:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:28,315 INFO L93 Difference]: Finished difference Result 4271 states and 5476 transitions. [2022-11-20 12:50:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 12:50:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-11-20 12:50:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:28,320 INFO L225 Difference]: With dead ends: 4271 [2022-11-20 12:50:28,321 INFO L226 Difference]: Without dead ends: 4271 [2022-11-20 12:50:28,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=1694, Invalid=12346, Unknown=6, NotChecked=234, Total=14280 [2022-11-20 12:50:28,323 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 2107 mSDsluCounter, 3818 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2107 SdHoareTripleChecker+Valid, 4020 SdHoareTripleChecker+Invalid, 3351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:28,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2107 Valid, 4020 Invalid, 3351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2811 Invalid, 0 Unknown, 302 Unchecked, 3.7s Time] [2022-11-20 12:50:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2022-11-20 12:50:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3793. [2022-11-20 12:50:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3561 states have (on average 1.2777309744453804) internal successors, (4550), 3620 states have internal predecessors, (4550), 174 states have call successors, (174), 34 states have call predecessors, (174), 34 states have return successors, (174), 138 states have call predecessors, (174), 174 states have call successors, (174) [2022-11-20 12:50:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 4898 transitions. [2022-11-20 12:50:28,387 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 4898 transitions. Word has length 58 [2022-11-20 12:50:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:28,388 INFO L495 AbstractCegarLoop]: Abstraction has 3793 states and 4898 transitions. [2022-11-20 12:50:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 36 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:50:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 4898 transitions. [2022-11-20 12:50:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:50:28,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:28,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:28,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:28,603 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:50:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 764597623, now seen corresponding path program 1 times [2022-11-20 12:50:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:28,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654228159] [2022-11-20 12:50:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:50:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:50:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:50:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654228159] [2022-11-20 12:50:29,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654228159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783347832] [2022-11-20 12:50:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:29,829 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:29,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:50:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 12:50:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:30,362 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:50:30,362 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 11 treesize of output 11 [2022-11-20 12:50:30,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:30,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:30,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:30,980 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:50:30,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:50:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:32,116 INFO L321 Elim1Store]: treesize reduction 30, result has 51.6 percent of original size [2022-11-20 12:50:32,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 98 [2022-11-20 12:50:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:32,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-20 12:50:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:33,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:50:33,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 65 [2022-11-20 12:50:33,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 12:50:34,111 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 12:50:34,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:35,032 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-20 12:50:35,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-20 12:50:38,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783347832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:38,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:50:38,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-20 12:50:38,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755904853] [2022-11-20 12:50:38,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:50:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:50:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1868, Unknown=14, NotChecked=0, Total=2070 [2022-11-20 12:50:38,437 INFO L87 Difference]: Start difference. First operand 3793 states and 4898 transitions. Second operand has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:50:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:43,073 INFO L93 Difference]: Finished difference Result 4627 states and 5877 transitions. [2022-11-20 12:50:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:50:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-11-20 12:50:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:43,093 INFO L225 Difference]: With dead ends: 4627 [2022-11-20 12:50:43,093 INFO L226 Difference]: Without dead ends: 4627 [2022-11-20 12:50:43,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=578, Invalid=5259, Unknown=15, NotChecked=0, Total=5852 [2022-11-20 12:50:43,096 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 333 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:43,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 2783 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 803 Invalid, 0 Unknown, 400 Unchecked, 1.0s Time] [2022-11-20 12:50:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2022-11-20 12:50:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 4309. [2022-11-20 12:50:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4309 states, 4035 states have (on average 1.2634448574969022) internal successors, (5098), 4107 states have internal predecessors, (5098), 204 states have call successors, (204), 46 states have call predecessors, (204), 46 states have return successors, (204), 155 states have call predecessors, (204), 204 states have call successors, (204) [2022-11-20 12:50:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 5506 transitions. [2022-11-20 12:50:43,199 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 5506 transitions. Word has length 58 [2022-11-20 12:50:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:43,199 INFO L495 AbstractCegarLoop]: Abstraction has 4309 states and 5506 transitions. [2022-11-20 12:50:43,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:50:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 5506 transitions. [2022-11-20 12:50:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 12:50:43,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:43,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:43,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:43,415 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:50:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2067277252, now seen corresponding path program 1 times [2022-11-20 12:50:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116856600] [2022-11-20 12:50:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:50:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:50:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:50:44,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116856600] [2022-11-20 12:50:44,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116856600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654994350] [2022-11-20 12:50:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:44,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:44,846 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:44,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:50:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:50:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:45,444 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:50:45,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:50:45,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:45,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:45,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:50:46,141 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:50:46,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:50:47,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:47,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:47,256 INFO L321 Elim1Store]: treesize reduction 30, result has 51.6 percent of original size [2022-11-20 12:50:47,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 102 [2022-11-20 12:50:47,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:47,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-20 12:50:48,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:48,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:50:48,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 69 [2022-11-20 12:50:48,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 12:50:49,122 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 12:50:49,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:50:51,960 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-20 12:50:51,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-20 12:50:57,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654994350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:57,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:50:57,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2022-11-20 12:50:57,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022411148] [2022-11-20 12:50:57,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:57,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:50:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:50:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1919, Unknown=13, NotChecked=0, Total=2162 [2022-11-20 12:50:57,232 INFO L87 Difference]: Start difference. First operand 4309 states and 5506 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:51:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:00,354 INFO L93 Difference]: Finished difference Result 4379 states and 5593 transitions. [2022-11-20 12:51:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:51:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2022-11-20 12:51:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:00,360 INFO L225 Difference]: With dead ends: 4379 [2022-11-20 12:51:00,360 INFO L226 Difference]: Without dead ends: 4379 [2022-11-20 12:51:00,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=518, Invalid=4159, Unknown=15, NotChecked=0, Total=4692 [2022-11-20 12:51:00,361 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 137 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:00,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1899 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 504 Invalid, 0 Unknown, 331 Unchecked, 0.6s Time] [2022-11-20 12:51:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2022-11-20 12:51:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 4311. [2022-11-20 12:51:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 4037 states have (on average 1.2630666336388408) internal successors, (5099), 4109 states have internal predecessors, (5099), 204 states have call successors, (204), 46 states have call predecessors, (204), 46 states have return successors, (204), 155 states have call predecessors, (204), 204 states have call successors, (204) [2022-11-20 12:51:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 5507 transitions. [2022-11-20 12:51:00,434 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 5507 transitions. Word has length 59 [2022-11-20 12:51:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:00,434 INFO L495 AbstractCegarLoop]: Abstraction has 4311 states and 5507 transitions. [2022-11-20 12:51:00,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:51:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 5507 transitions. [2022-11-20 12:51:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 12:51:00,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:00,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:00,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:00,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-20 12:51:00,646 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:51:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 338914841, now seen corresponding path program 1 times [2022-11-20 12:51:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:00,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616186382] [2022-11-20 12:51:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:02,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:51:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:02,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:51:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:51:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616186382] [2022-11-20 12:51:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616186382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582432608] [2022-11-20 12:51:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:02,678 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:02,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:51:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 12:51:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:03,229 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:51:03,229 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 12:51:03,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:03,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:03,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:03,715 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:51:03,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:51:04,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:04,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-20 12:51:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:51:04,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2022-11-20 12:51:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:51:05,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2022-11-20 12:51:05,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 12:51:05,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:51:05,348 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 12:51:05,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:06,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:51:06,493 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-20 12:51:06,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2022-11-20 12:51:06,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:51:06,672 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 44 treesize of output 48 [2022-11-20 12:51:07,950 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse0 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse4 (+ |c_~#list~0.offset| .cse2))) (and (or (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720) |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse0) 0))) (= |c_~#list~0.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int) (v_ArrVal_1724 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720))) (let ((.cse1 (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse1 .cse0) 0)) (= 0 (select .cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse2))) (not (= (select (select (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse0 v_ArrVal_1724)) |c_~#list~0.base|) .cse4) |c_~#list~0.base|)))))) (or (forall ((v_ArrVal_1720 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int) (v_ArrVal_1724 Int)) (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1720))) (let ((.cse5 (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (not (= (select .cse5 .cse0) 0)) (not (= (select (select (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store .cse5 .cse0 v_ArrVal_1724)) |c_~#list~0.base|) .cse4) |c_~#list~0.base|)))))) (= |c_~#list~0.offset| |c_ULTIMATE.start_append_one_~list#1.offset|))))) is different from false [2022-11-20 12:51:08,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582432608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:08,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:51:08,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 35 [2022-11-20 12:51:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595522169] [2022-11-20 12:51:08,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:51:08,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:51:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2257, Unknown=3, NotChecked=96, Total=2550 [2022-11-20 12:51:08,834 INFO L87 Difference]: Start difference. First operand 4311 states and 5507 transitions. Second operand has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:51:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:45,243 INFO L93 Difference]: Finished difference Result 7958 states and 10251 transitions. [2022-11-20 12:51:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-20 12:51:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 60 [2022-11-20 12:51:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:45,255 INFO L225 Difference]: With dead ends: 7958 [2022-11-20 12:51:45,255 INFO L226 Difference]: Without dead ends: 7958 [2022-11-20 12:51:45,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10497 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=5322, Invalid=28719, Unknown=3, NotChecked=366, Total=34410 [2022-11-20 12:51:45,258 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 3503 mSDsluCounter, 5510 mSDsCounter, 0 mSdLazyCounter, 6148 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 5779 SdHoareTripleChecker+Invalid, 6637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 6148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:45,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 5779 Invalid, 6637 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [489 Valid, 6148 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-20 12:51:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2022-11-20 12:51:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 5380. [2022-11-20 12:51:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5057 states have (on average 1.266165710895788) internal successors, (6403), 5137 states have internal predecessors, (6403), 246 states have call successors, (246), 53 states have call predecessors, (246), 53 states have return successors, (246), 189 states have call predecessors, (246), 246 states have call successors, (246) [2022-11-20 12:51:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 6895 transitions. [2022-11-20 12:51:45,362 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 6895 transitions. Word has length 60 [2022-11-20 12:51:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:45,362 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 6895 transitions. [2022-11-20 12:51:45,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:51:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 6895 transitions. [2022-11-20 12:51:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 12:51:45,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:45,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:45,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 12:51:45,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:45,572 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:51:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:45,573 INFO L85 PathProgramCache]: Analyzing trace with hash 246931767, now seen corresponding path program 1 times [2022-11-20 12:51:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760674326] [2022-11-20 12:51:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:47,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:51:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:47,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:51:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:51:47,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:47,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760674326] [2022-11-20 12:51:47,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760674326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485249610] [2022-11-20 12:51:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:47,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:47,939 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:51:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-20 12:51:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:48,948 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:51:48,948 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 12:51:49,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:51:49,663 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 12:51:49,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 12:51:49,684 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:51:49,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:51:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:50,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:50,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:51:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:50,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2022-11-20 12:51:50,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:51:50,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:51:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:51:50,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:51:50,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-11-20 12:51:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:51:51,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:18,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485249610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:18,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:52:18,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2022-11-20 12:52:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829262338] [2022-11-20 12:52:18,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 12:52:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 12:52:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2882, Unknown=6, NotChecked=0, Total=3080 [2022-11-20 12:52:18,679 INFO L87 Difference]: Start difference. First operand 5380 states and 6895 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:52:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:33,540 INFO L93 Difference]: Finished difference Result 8804 states and 11616 transitions. [2022-11-20 12:52:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 12:52:33,540 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-11-20 12:52:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:33,552 INFO L225 Difference]: With dead ends: 8804 [2022-11-20 12:52:33,553 INFO L226 Difference]: Without dead ends: 8788 [2022-11-20 12:52:33,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=1329, Invalid=10221, Unknown=6, NotChecked=0, Total=11556 [2022-11-20 12:52:33,555 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1891 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:33,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1894 Valid, 3529 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2180 Invalid, 0 Unknown, 297 Unchecked, 2.8s Time] [2022-11-20 12:52:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2022-11-20 12:52:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 5776. [2022-11-20 12:52:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5417 states have (on average 1.2615839025290752) internal successors, (6834), 5497 states have internal predecessors, (6834), 271 states have call successors, (271), 64 states have call predecessors, (271), 64 states have return successors, (271), 214 states have call predecessors, (271), 271 states have call successors, (271) [2022-11-20 12:52:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 7376 transitions. [2022-11-20 12:52:33,673 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 7376 transitions. Word has length 61 [2022-11-20 12:52:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:33,674 INFO L495 AbstractCegarLoop]: Abstraction has 5776 states and 7376 transitions. [2022-11-20 12:52:33,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:52:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 7376 transitions. [2022-11-20 12:52:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 12:52:33,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:33,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:33,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:52:33,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-20 12:52:33,884 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:52:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1868138295, now seen corresponding path program 2 times [2022-11-20 12:52:33,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829082841] [2022-11-20 12:52:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:36,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:52:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:36,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:52:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:52:36,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829082841] [2022-11-20 12:52:36,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829082841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576198527] [2022-11-20 12:52:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:52:36,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:36,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:36,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:52:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:52:36,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 12:52:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:36,785 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:52:36,785 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 12:52:36,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:36,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:37,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:37,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:37,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:37,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:52:37,480 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 12:52:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 12:52:37,501 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:52:37,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:52:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:52:38,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:38,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 25 [2022-11-20 12:52:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:38,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:52:38,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:52:38,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:52:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:39,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:39,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:52:39,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 60 [2022-11-20 12:52:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576198527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:51,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:52:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2022-11-20 12:52:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603876079] [2022-11-20 12:52:51,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 12:52:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 12:52:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2990, Unknown=4, NotChecked=0, Total=3192 [2022-11-20 12:52:51,643 INFO L87 Difference]: Start difference. First operand 5776 states and 7376 transitions. Second operand has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:53:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:08,565 INFO L93 Difference]: Finished difference Result 6276 states and 7995 transitions. [2022-11-20 12:53:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 12:53:08,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-11-20 12:53:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:08,574 INFO L225 Difference]: With dead ends: 6276 [2022-11-20 12:53:08,574 INFO L226 Difference]: Without dead ends: 6265 [2022-11-20 12:53:08,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1785, Invalid=12731, Unknown=4, NotChecked=0, Total=14520 [2022-11-20 12:53:08,575 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2059 mSDsluCounter, 3834 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:08,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2060 Valid, 4040 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2450 Invalid, 0 Unknown, 122 Unchecked, 3.2s Time] [2022-11-20 12:53:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6265 states. [2022-11-20 12:53:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6265 to 4994. [2022-11-20 12:53:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4680 states have (on average 1.2525641025641026) internal successors, (5862), 4751 states have internal predecessors, (5862), 234 states have call successors, (234), 56 states have call predecessors, (234), 56 states have return successors, (234), 186 states have call predecessors, (234), 234 states have call successors, (234) [2022-11-20 12:53:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 6330 transitions. [2022-11-20 12:53:08,643 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 6330 transitions. Word has length 61 [2022-11-20 12:53:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 4994 states and 6330 transitions. [2022-11-20 12:53:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 38 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:53:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 6330 transitions. [2022-11-20 12:53:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 12:53:08,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:08,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:08,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:08,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-20 12:53:08,848 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:53:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1916425694, now seen corresponding path program 1 times [2022-11-20 12:53:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:08,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217811853] [2022-11-20 12:53:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:08,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:53:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:09,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:53:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:53:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217811853] [2022-11-20 12:53:09,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217811853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304800676] [2022-11-20 12:53:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:09,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:09,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:09,283 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:09,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 12:53:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:53:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:10,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:53:10,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304800676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:53:10,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:53:10,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2022-11-20 12:53:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115137532] [2022-11-20 12:53:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:53:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:53:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:53:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:53:10,231 INFO L87 Difference]: Start difference. First operand 4994 states and 6330 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:53:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:11,484 INFO L93 Difference]: Finished difference Result 8891 states and 11405 transitions. [2022-11-20 12:53:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:53:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-11-20 12:53:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:11,495 INFO L225 Difference]: With dead ends: 8891 [2022-11-20 12:53:11,495 INFO L226 Difference]: Without dead ends: 8891 [2022-11-20 12:53:11,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:53:11,496 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1047 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:11,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 532 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:53:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8891 states. [2022-11-20 12:53:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8891 to 4993. [2022-11-20 12:53:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4680 states have (on average 1.2476495726495727) internal successors, (5839), 4750 states have internal predecessors, (5839), 234 states have call successors, (234), 56 states have call predecessors, (234), 56 states have return successors, (234), 186 states have call predecessors, (234), 234 states have call successors, (234) [2022-11-20 12:53:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 6307 transitions. [2022-11-20 12:53:11,596 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 6307 transitions. Word has length 61 [2022-11-20 12:53:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:11,596 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 6307 transitions. [2022-11-20 12:53:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:53:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 6307 transitions. [2022-11-20 12:53:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:53:11,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:11,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:11,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:11,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:11,806 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:53:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1407510296, now seen corresponding path program 1 times [2022-11-20 12:53:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:11,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754474639] [2022-11-20 12:53:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:12,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:53:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 12:53:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:53:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754474639] [2022-11-20 12:53:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754474639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:53:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:53:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 12:53:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139119306] [2022-11-20 12:53:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:53:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:53:12,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:53:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:53:12,697 INFO L87 Difference]: Start difference. First operand 4993 states and 6307 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:53:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:14,438 INFO L93 Difference]: Finished difference Result 6226 states and 7744 transitions. [2022-11-20 12:53:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:53:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-11-20 12:53:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:14,447 INFO L225 Difference]: With dead ends: 6226 [2022-11-20 12:53:14,447 INFO L226 Difference]: Without dead ends: 6226 [2022-11-20 12:53:14,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=893, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:53:14,448 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 1083 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:14,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 1491 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:53:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2022-11-20 12:53:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 4199. [2022-11-20 12:53:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 3928 states have (on average 1.2512729124236253) internal successors, (4915), 4004 states have internal predecessors, (4915), 196 states have call successors, (196), 52 states have call predecessors, (196), 52 states have return successors, (196), 142 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-20 12:53:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5307 transitions. [2022-11-20 12:53:14,528 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5307 transitions. Word has length 68 [2022-11-20 12:53:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:14,529 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 5307 transitions. [2022-11-20 12:53:14,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:53:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5307 transitions. [2022-11-20 12:53:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 12:53:14,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:14,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:14,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-20 12:53:14,533 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:53:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash -742029570, now seen corresponding path program 1 times [2022-11-20 12:53:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:14,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395454730] [2022-11-20 12:53:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:53:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:17,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:53:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:53:17,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395454730] [2022-11-20 12:53:17,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395454730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525022910] [2022-11-20 12:53:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:17,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:17,269 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:17,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 12:53:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-20 12:53:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:17,949 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:53:17,950 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 12:53:18,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:18,639 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:53:18,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:53:18,662 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 12:53:18,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:53:18,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:53:18,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:53:18,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 59 [2022-11-20 12:53:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:53:19,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:19,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2022-11-20 12:53:20,123 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:53:20,123 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 12:53:20,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-20 12:53:20,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-20 12:53:20,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-20 12:53:20,986 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:53:20,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 62 [2022-11-20 12:53:21,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:53:21,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 35 [2022-11-20 12:53:21,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-11-20 12:53:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:21,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:22,073 INFO L321 Elim1Store]: treesize reduction 5, result has 85.3 percent of original size [2022-11-20 12:53:22,073 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 38 treesize of output 37 [2022-11-20 12:53:22,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2127 Int)) (= |c_ULTIMATE.start_create_item_~link#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2125))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2127))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))))) is different from false [2022-11-20 12:53:22,101 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2124 (Array Int Int)) (v_ArrVal_2127 Int)) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2124) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2125))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2127))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) |c_ULTIMATE.start_create_item_~link#1.base|)) is different from false [2022-11-20 12:53:22,151 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2124 (Array Int Int)) (v_ArrVal_2127 Int) (|v_ULTIMATE.start_create_item_~item~0#1.base_30| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_30|) 0)) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_item_~item~0#1.base_30| v_ArrVal_2124) |c_ULTIMATE.start_append_one_#t~mem7#1.base| v_ArrVal_2125))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2127))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) |c_ULTIMATE.start_append_one_#t~mem7#1.base|))) is different from false [2022-11-20 12:53:22,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525022910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:22,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:53:22,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 45 [2022-11-20 12:53:22,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181142496] [2022-11-20 12:53:22,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:22,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:53:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:53:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2432, Unknown=5, NotChecked=306, Total=2970 [2022-11-20 12:53:22,458 INFO L87 Difference]: Start difference. First operand 4199 states and 5307 transitions. Second operand has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:53:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:39,992 INFO L93 Difference]: Finished difference Result 11061 states and 14151 transitions. [2022-11-20 12:53:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 12:53:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 77 [2022-11-20 12:53:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:40,010 INFO L225 Difference]: With dead ends: 11061 [2022-11-20 12:53:40,010 INFO L226 Difference]: Without dead ends: 11061 [2022-11-20 12:53:40,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 6716 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2627, Invalid=19136, Unknown=5, NotChecked=882, Total=22650 [2022-11-20 12:53:40,014 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 3245 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 4039 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3245 SdHoareTripleChecker+Valid, 5210 SdHoareTripleChecker+Invalid, 4804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 4039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:40,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3245 Valid, 5210 Invalid, 4804 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [358 Valid, 4039 Invalid, 0 Unknown, 407 Unchecked, 4.8s Time] [2022-11-20 12:53:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11061 states. [2022-11-20 12:53:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11061 to 6193. [2022-11-20 12:53:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 5843 states have (on average 1.2264247817901763) internal successors, (7166), 5888 states have internal predecessors, (7166), 263 states have call successors, (263), 64 states have call predecessors, (263), 64 states have return successors, (263), 240 states have call predecessors, (263), 263 states have call successors, (263) [2022-11-20 12:53:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 7692 transitions. [2022-11-20 12:53:40,193 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 7692 transitions. Word has length 77 [2022-11-20 12:53:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:40,193 INFO L495 AbstractCegarLoop]: Abstraction has 6193 states and 7692 transitions. [2022-11-20 12:53:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.2) internal successors, (144), 42 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:53:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 7692 transitions. [2022-11-20 12:53:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 12:53:40,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:40,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:40,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:40,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-20 12:53:40,403 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:53:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -742029569, now seen corresponding path program 1 times [2022-11-20 12:53:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933378510] [2022-11-20 12:53:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:53:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:47,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:53:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:53:47,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:47,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933378510] [2022-11-20 12:53:47,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933378510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:47,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872514403] [2022-11-20 12:53:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:47,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:47,653 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 12:53:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-20 12:53:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:48,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:53:48,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:53:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 12:53:48,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:48,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:48,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:48,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:48,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:48,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:53:49,607 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:53:49,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:53:49,636 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:53:49,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:53:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:50,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 40 [2022-11-20 12:53:50,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:53:51,896 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-20 12:53:51,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2022-11-20 12:53:51,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 12:53:52,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-20 12:53:52,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:53:52,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:53:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-20 12:53:52,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-20 12:53:52,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:53:53,138 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:53:53,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-11-20 12:53:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:53,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 12:53:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:53,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:53:53,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 35 [2022-11-20 12:53:53,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:53,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 12:53:54,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-11-20 12:53:54,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:53:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:54,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:55,294 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* ~unnamed2~0~ITEM_PREV 4)) (.cse2 (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4)))) (and (forall ((v_ArrVal_2280 (Array Int Int)) (v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int)) (v_ArrVal_2281 Int)) (<= (+ .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 v_ArrVal_2282))) |c_~#list~0.base|) .cse3) 4) (select |c_#length| (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2280))) (store .cse4 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 v_ArrVal_2281))) |c_~#list~0.base|) .cse3)))) (forall ((v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int))) (<= 0 (+ .cse0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 v_ArrVal_2282))) |c_~#list~0.base|) .cse3)))))) is different from false [2022-11-20 12:53:55,343 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse3 (* ~unnamed2~0~ITEM_PREV 4))) (and (forall ((v_ArrVal_2280 (Array Int Int)) (v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int)) (v_ArrVal_2278 (Array Int Int)) (v_ArrVal_2277 (Array Int Int)) (v_ArrVal_2281 Int)) (<= (+ (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2277) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2282))) |c_~#list~0.base|) .cse2) .cse3 4) (select |c_#length| (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2278) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2280))) (store .cse4 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2281))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_2282 Int) (v_ArrVal_2279 (Array Int Int)) (v_ArrVal_2277 (Array Int Int))) (<= 0 (+ (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2277) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2279))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) .cse1 v_ArrVal_2282))) |c_~#list~0.base|) .cse2) .cse3))))) is different from false [2022-11-20 12:53:56,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872514403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:56,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:53:56,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 52 [2022-11-20 12:53:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401464513] [2022-11-20 12:53:56,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:56,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:53:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:53:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3518, Unknown=3, NotChecked=242, Total=4032 [2022-11-20 12:53:56,955 INFO L87 Difference]: Start difference. First operand 6193 states and 7692 transitions. Second operand has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:54:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:40,085 INFO L93 Difference]: Finished difference Result 12965 states and 16629 transitions. [2022-11-20 12:54:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-20 12:54:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 77 [2022-11-20 12:54:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:40,111 INFO L225 Difference]: With dead ends: 12965 [2022-11-20 12:54:40,112 INFO L226 Difference]: Without dead ends: 12965 [2022-11-20 12:54:40,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 165 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=3204, Invalid=23861, Unknown=3, NotChecked=654, Total=27722 [2022-11-20 12:54:40,116 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 5450 mSDsluCounter, 5542 mSDsCounter, 0 mSdLazyCounter, 5295 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5453 SdHoareTripleChecker+Valid, 5734 SdHoareTripleChecker+Invalid, 6509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 5295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:40,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5453 Valid, 5734 Invalid, 6509 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 5295 Invalid, 0 Unknown, 665 Unchecked, 8.3s Time] [2022-11-20 12:54:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12965 states. [2022-11-20 12:54:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12965 to 7912. [2022-11-20 12:54:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7912 states, 7474 states have (on average 1.2262510034787262) internal successors, (9165), 7527 states have internal predecessors, (9165), 338 states have call successors, (338), 77 states have call predecessors, (338), 77 states have return successors, (338), 307 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-20 12:54:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7912 states to 7912 states and 9841 transitions. [2022-11-20 12:54:40,321 INFO L78 Accepts]: Start accepts. Automaton has 7912 states and 9841 transitions. Word has length 77 [2022-11-20 12:54:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:40,322 INFO L495 AbstractCegarLoop]: Abstraction has 7912 states and 9841 transitions. [2022-11-20 12:54:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 49 states have internal predecessors, (144), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:54:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7912 states and 9841 transitions. [2022-11-20 12:54:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 12:54:40,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:40,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:40,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 12:54:40,533 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:54:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2047531060, now seen corresponding path program 1 times [2022-11-20 12:54:40,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:40,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686857626] [2022-11-20 12:54:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:54:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:44,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:54:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 12:54:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:54:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686857626] [2022-11-20 12:54:44,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686857626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518258821] [2022-11-20 12:54:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:44,675 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:44,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 12:54:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 12:54:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:54:46,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 104 [2022-11-20 12:54:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:46,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:54:46,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 76 [2022-11-20 12:54:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:54:47,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:54:49,477 INFO L321 Elim1Store]: treesize reduction 12, result has 82.6 percent of original size [2022-11-20 12:54:49,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 153 [2022-11-20 12:54:49,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:54:49,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:54:49,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:54:49,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 113 [2022-11-20 12:54:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:54:50,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518258821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:50,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:50,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 14] total 54 [2022-11-20 12:54:50,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045880156] [2022-11-20 12:54:50,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 12:54:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 12:54:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 12:54:50,913 INFO L87 Difference]: Start difference. First operand 7912 states and 9841 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 12:55:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:18,898 INFO L93 Difference]: Finished difference Result 8626 states and 10732 transitions. [2022-11-20 12:55:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 12:55:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 79 [2022-11-20 12:55:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:18,912 INFO L225 Difference]: With dead ends: 8626 [2022-11-20 12:55:18,912 INFO L226 Difference]: Without dead ends: 8615 [2022-11-20 12:55:18,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5099 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=2702, Invalid=15658, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 12:55:18,916 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 3509 mSDsluCounter, 5740 mSDsCounter, 0 mSdLazyCounter, 4779 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 4779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:18,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 5979 Invalid, 5130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [351 Valid, 4779 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-20 12:55:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2022-11-20 12:55:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 7180. [2022-11-20 12:55:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7180 states, 6783 states have (on average 1.2199616688780774) internal successors, (8275), 6832 states have internal predecessors, (8275), 306 states have call successors, (306), 68 states have call predecessors, (306), 68 states have return successors, (306), 279 states have call predecessors, (306), 306 states have call successors, (306) [2022-11-20 12:55:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 8887 transitions. [2022-11-20 12:55:19,043 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 8887 transitions. Word has length 79 [2022-11-20 12:55:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:19,043 INFO L495 AbstractCegarLoop]: Abstraction has 7180 states and 8887 transitions. [2022-11-20 12:55:19,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 52 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 12:55:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 8887 transitions. [2022-11-20 12:55:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 12:55:19,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:19,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:19,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-20 12:55:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:19,246 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:55:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 393975138, now seen corresponding path program 1 times [2022-11-20 12:55:19,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:19,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663872674] [2022-11-20 12:55:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:19,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:55:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:55:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:55:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663872674] [2022-11-20 12:55:22,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663872674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263708212] [2022-11-20 12:55:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:22,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:22,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:22,211 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1654071-29b9-4abe-91b3-3a6c95a82996/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 12:55:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 12:55:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:22,984 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:55:22,984 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 12:55:23,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:55:23,808 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 12:55:23,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-20 12:55:23,832 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 12:55:23,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:55:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:55:24,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:55:24,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 59 [2022-11-20 12:55:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:55:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:24,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2022-11-20 12:55:25,578 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:55:25,579 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 12:55:25,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-20 12:55:26,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-20 12:55:26,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2022-11-20 12:55:26,597 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:55:26,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2022-11-20 12:55:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:55:26,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:55:26,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 33 [2022-11-20 12:55:27,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-11-20 12:55:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:27,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:27,923 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2556 (Array Int Int)) (v_ArrVal_2558 Int)) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2556))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2558))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-20 12:55:27,946 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2556 (Array Int Int)) (v_ArrVal_2555 (Array Int Int)) (v_ArrVal_2558 Int)) (<= (+ (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_2555) |c_ULTIMATE.start_create_item_~link#1.base| v_ArrVal_2556))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* |c_ULTIMATE.start_append_one_~to#1| 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_2558))) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-20 12:55:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263708212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:28,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:55:28,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 45 [2022-11-20 12:55:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061659278] [2022-11-20 12:55:28,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:55:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:55:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2477, Unknown=7, NotChecked=206, Total=2970 [2022-11-20 12:55:28,436 INFO L87 Difference]: Start difference. First operand 7180 states and 8887 transitions. Second operand has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 42 states have internal predecessors, (150), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)