./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8 --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 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- 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-e04fb08 [2022-11-16 12:46:58,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:46:58,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:46:58,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:46:58,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:46:58,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:46:58,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:46:58,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:46:58,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:46:58,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:46:58,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:46:58,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:46:58,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:46:58,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:46:58,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:46:58,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:46:58,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:46:58,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:46:58,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:46:58,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:46:58,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:46:58,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:46:58,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:46:58,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:46:58,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:46:58,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:46:58,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:46:58,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:46:58,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:46:58,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:46:58,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:46:58,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:46:58,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:46:58,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:46:58,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:46:58,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:46:58,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:46:58,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:46:58,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:46:58,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:46:58,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:46:58,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:46:59,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:46:59,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:46:59,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:46:59,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:46:59,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:46:59,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:46:59,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:46:59,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:46:59,040 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:46:59,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:46:59,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:46:59,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:46:59,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:46:59,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:46:59,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:46:59,043 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:46:59,043 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:46:59,043 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:46:59,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:46:59,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:46:59,044 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:46:59,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:46:59,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:46:59,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:46:59,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:46:59,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:46:59,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:46:59,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:46:59,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:46:59,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:46:59,048 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_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2022-11-16 12:46:59,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:46:59,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:46:59,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:46:59,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:46:59,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:46:59,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-16 12:46:59,437 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/data/fa670de82/49f7050dd43d40aa8db62a47e35d00dd/FLAGdc02ce061 [2022-11-16 12:47:00,054 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:47:00,060 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-16 12:47:00,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/data/fa670de82/49f7050dd43d40aa8db62a47e35d00dd/FLAGdc02ce061 [2022-11-16 12:47:00,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/data/fa670de82/49f7050dd43d40aa8db62a47e35d00dd [2022-11-16 12:47:00,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:47:00,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:47:00,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:00,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:47:00,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:47:00,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:00" (1/1) ... [2022-11-16 12:47:00,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b47746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:00, skipping insertion in model container [2022-11-16 12:47:00,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:00" (1/1) ... [2022-11-16 12:47:00,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:47:00,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:47:01,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:01,017 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:47:01,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:01,134 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:47:01,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01 WrapperNode [2022-11-16 12:47:01,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:01,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:01,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:47:01,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:47:01,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,229 INFO L138 Inliner]: procedures = 188, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 203 [2022-11-16 12:47:01,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:01,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:47:01,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:47:01,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:47:01,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,294 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:47:01,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:47:01,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:47:01,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:47:01,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (1/1) ... [2022-11-16 12:47:01,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:47:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:01,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:47:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:47:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:47:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:47:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:47:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-16 12:47:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-16 12:47:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:47:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:47:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:47:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:47:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:47:01,581 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:47:01,584 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:47:02,236 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:47:02,245 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:47:02,246 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 12:47:02,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:02 BoogieIcfgContainer [2022-11-16 12:47:02,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:47:02,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:47:02,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:47:02,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:47:02,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:47:00" (1/3) ... [2022-11-16 12:47:02,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582d3c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:02, skipping insertion in model container [2022-11-16 12:47:02,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:01" (2/3) ... [2022-11-16 12:47:02,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582d3c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:02, skipping insertion in model container [2022-11-16 12:47:02,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:02" (3/3) ... [2022-11-16 12:47:02,260 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2022-11-16 12:47:02,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:47:02,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2022-11-16 12:47:02,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:47:02,343 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;@3d73f553, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:47:02,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-16 12:47:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:47:02,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:02,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:47:02,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-11-16 12:47:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783389215] [2022-11-16 12:47:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783389215] [2022-11-16 12:47:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783389215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:02,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:02,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:47:02,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042997138] [2022-11-16 12:47:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:47:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:47:02,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:47:02,544 INFO L87 Difference]: Start difference. First operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:02,577 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2022-11-16 12:47:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:47:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 12:47:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:02,589 INFO L225 Difference]: With dead ends: 191 [2022-11-16 12:47:02,589 INFO L226 Difference]: Without dead ends: 189 [2022-11-16 12:47:02,591 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 [2022-11-16 12:47:02,595 INFO L413 NwaCegarLoop]: 206 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, 206 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 [2022-11-16 12:47:02,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:47:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-16 12:47:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-16 12:47:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.794392523364486) internal successors, (192), 181 states have internal predecessors, (192), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2022-11-16 12:47:02,664 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 4 [2022-11-16 12:47:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:02,664 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2022-11-16 12:47:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2022-11-16 12:47:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:47:02,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:02,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:47:02,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:47:02,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 889842618, now seen corresponding path program 1 times [2022-11-16 12:47:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:02,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005264398] [2022-11-16 12:47:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:02,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:02,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481684179] [2022-11-16 12:47:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:02,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:02,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:47:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:47:02,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:02,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:02,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:02,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:02,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005264398] [2022-11-16 12:47:02,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:02,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481684179] [2022-11-16 12:47:02,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481684179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:02,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:02,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:47:02,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906354977] [2022-11-16 12:47:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:02,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:02,982 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:03,232 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2022-11-16 12:47:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:47:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:03,234 INFO L225 Difference]: With dead ends: 188 [2022-11-16 12:47:03,235 INFO L226 Difference]: Without dead ends: 188 [2022-11-16 12:47:03,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:03,236 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:03,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:47:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-16 12:47:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-16 12:47:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 107 states have (on average 1.7850467289719627) internal successors, (191), 180 states have internal predecessors, (191), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2022-11-16 12:47:03,248 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 6 [2022-11-16 12:47:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:03,248 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2022-11-16 12:47:03,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2022-11-16 12:47:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:47:03,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:03,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:03,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:03,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1815317712, now seen corresponding path program 1 times [2022-11-16 12:47:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:03,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154621595] [2022-11-16 12:47:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:03,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:03,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618174311] [2022-11-16 12:47:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:03,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:03,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:47:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:47:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:03,648 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 8 treesize of output 7 [2022-11-16 12:47:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:03,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:03,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154621595] [2022-11-16 12:47:03,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618174311] [2022-11-16 12:47:03,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618174311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:03,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:03,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129915123] [2022-11-16 12:47:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:47:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:47:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:47:03,690 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:03,893 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2022-11-16 12:47:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:47:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:47:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:03,897 INFO L225 Difference]: With dead ends: 197 [2022-11-16 12:47:03,897 INFO L226 Difference]: Without dead ends: 197 [2022-11-16 12:47:03,898 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 [2022-11-16 12:47:03,899 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:03,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 519 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:47:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-16 12:47:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-16 12:47:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 115 states have (on average 1.7391304347826086) internal successors, (200), 188 states have internal predecessors, (200), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2022-11-16 12:47:03,921 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 7 [2022-11-16 12:47:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:03,921 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2022-11-16 12:47:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2022-11-16 12:47:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:47:03,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:03,924 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:03,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:04,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1660157209, now seen corresponding path program 1 times [2022-11-16 12:47:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:04,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074107798] [2022-11-16 12:47:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:04,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:04,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223444009] [2022-11-16 12:47:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:04,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:04,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:47:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:47:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:04,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:04,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:06,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-11-16 12:47:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 12:47:13,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:13,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074107798] [2022-11-16 12:47:13,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:13,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223444009] [2022-11-16 12:47:13,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223444009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:13,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:47:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722104288] [2022-11-16 12:47:13,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:13,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:47:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:47:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=11, Unknown=2, NotChecked=0, Total=20 [2022-11-16 12:47:13,998 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 12:47:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:14,038 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2022-11-16 12:47:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:47:14,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2022-11-16 12:47:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:14,041 INFO L225 Difference]: With dead ends: 209 [2022-11-16 12:47:14,041 INFO L226 Difference]: Without dead ends: 199 [2022-11-16 12:47:14,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=7, Invalid=11, Unknown=2, NotChecked=0, Total=20 [2022-11-16 12:47:14,042 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:14,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 715 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-11-16 12:47:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-16 12:47:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-11-16 12:47:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 117 states have (on average 1.7264957264957266) internal successors, (202), 190 states have internal predecessors, (202), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2022-11-16 12:47:14,051 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 66 [2022-11-16 12:47:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2022-11-16 12:47:14,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 12:47:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2022-11-16 12:47:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 12:47:14,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:14,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:14,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:47:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:14,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash -359143275, now seen corresponding path program 1 times [2022-11-16 12:47:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187648577] [2022-11-16 12:47:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:14,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:14,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826102588] [2022-11-16 12:47:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:14,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:14,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:14,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:47:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:47:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:14,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:47:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:47:14,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 12:47:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187648577] [2022-11-16 12:47:15,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826102588] [2022-11-16 12:47:15,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826102588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:15,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:15,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-16 12:47:15,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484479687] [2022-11-16 12:47:15,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:47:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:47:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:47:15,363 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:47:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:16,324 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2022-11-16 12:47:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:47:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-16 12:47:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:16,327 INFO L225 Difference]: With dead ends: 218 [2022-11-16 12:47:16,327 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 12:47:16,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:47:16,328 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 78 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:16,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1066 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:47:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 12:47:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-11-16 12:47:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 121 states have (on average 1.7024793388429753) internal successors, (206), 194 states have internal predecessors, (206), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 218 transitions. [2022-11-16 12:47:16,344 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 218 transitions. Word has length 71 [2022-11-16 12:47:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:16,345 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 218 transitions. [2022-11-16 12:47:16,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:47:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 218 transitions. [2022-11-16 12:47:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 12:47:16,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:16,351 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:16,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:47:16,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:16,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2015734887, now seen corresponding path program 2 times [2022-11-16 12:47:16,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:16,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177880507] [2022-11-16 12:47:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:16,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:16,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:16,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813178278] [2022-11-16 12:47:16,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:47:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:16,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:16,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:47:17,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:47:17,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:17,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:47:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:17,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:17,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:47:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-16 12:47:17,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 15 proven. 138 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-16 12:47:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177880507] [2022-11-16 12:47:18,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813178278] [2022-11-16 12:47:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813178278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:18,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:18,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-16 12:47:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811341244] [2022-11-16 12:47:18,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:47:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:47:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:47:18,692 INFO L87 Difference]: Start difference. First operand 203 states and 218 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:47:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:20,109 INFO L93 Difference]: Finished difference Result 243 states and 262 transitions. [2022-11-16 12:47:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:47:20,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2022-11-16 12:47:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:20,115 INFO L225 Difference]: With dead ends: 243 [2022-11-16 12:47:20,115 INFO L226 Difference]: Without dead ends: 213 [2022-11-16 12:47:20,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:47:20,116 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 121 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:20,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1285 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:47:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-16 12:47:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-11-16 12:47:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 131 states have (on average 1.6488549618320612) internal successors, (216), 204 states have internal predecessors, (216), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 228 transitions. [2022-11-16 12:47:20,125 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 228 transitions. Word has length 86 [2022-11-16 12:47:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:20,125 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 228 transitions. [2022-11-16 12:47:20,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:47:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 228 transitions. [2022-11-16 12:47:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-16 12:47:20,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:20,127 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:20,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:20,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1853789671, now seen corresponding path program 3 times [2022-11-16 12:47:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903712067] [2022-11-16 12:47:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:20,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:20,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307367051] [2022-11-16 12:47:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:47:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:20,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:47:20,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:47:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:20,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:47:20,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:20,707 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 8 treesize of output 7 [2022-11-16 12:47:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2022-11-16 12:47:20,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:20,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903712067] [2022-11-16 12:47:20,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307367051] [2022-11-16 12:47:20,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307367051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:20,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:20,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:20,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470674318] [2022-11-16 12:47:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:20,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:47:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:47:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:47:20,753 INFO L87 Difference]: Start difference. First operand 213 states and 228 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 12:47:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:21,024 INFO L93 Difference]: Finished difference Result 212 states and 227 transitions. [2022-11-16 12:47:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:47:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 106 [2022-11-16 12:47:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:21,027 INFO L225 Difference]: With dead ends: 212 [2022-11-16 12:47:21,028 INFO L226 Difference]: Without dead ends: 212 [2022-11-16 12:47:21,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:47:21,028 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 16 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:21,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 503 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:47:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-16 12:47:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-11-16 12:47:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 131 states have (on average 1.6412213740458015) internal successors, (215), 203 states have internal predecessors, (215), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 227 transitions. [2022-11-16 12:47:21,036 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 227 transitions. Word has length 106 [2022-11-16 12:47:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:21,037 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 227 transitions. [2022-11-16 12:47:21,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 12:47:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 227 transitions. [2022-11-16 12:47:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 12:47:21,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:21,040 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:21,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:21,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1349401770, now seen corresponding path program 1 times [2022-11-16 12:47:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909174567] [2022-11-16 12:47:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:21,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075497510] [2022-11-16 12:47:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:21,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:21,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:21,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:47:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:47:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:21,981 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1495 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1495))) is different from true [2022-11-16 12:47:22,208 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:47:22,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-16 12:47:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2022-11-16 12:47:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:22,914 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:47:22,914 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 [2022-11-16 12:47:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-16 12:47:22,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909174567] [2022-11-16 12:47:22,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075497510] [2022-11-16 12:47:22,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075497510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:22,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:22,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-11-16 12:47:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846543185] [2022-11-16 12:47:22,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:22,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:47:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:47:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2022-11-16 12:47:22,977 INFO L87 Difference]: Start difference. First operand 212 states and 227 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:47:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:24,328 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2022-11-16 12:47:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:47:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-11-16 12:47:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:24,333 INFO L225 Difference]: With dead ends: 244 [2022-11-16 12:47:24,333 INFO L226 Difference]: Without dead ends: 244 [2022-11-16 12:47:24,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=348, Unknown=1, NotChecked=40, Total=506 [2022-11-16 12:47:24,334 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 123 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1229 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 607 Invalid, 0 Unknown, 466 Unchecked, 0.9s Time] [2022-11-16 12:47:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-16 12:47:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2022-11-16 12:47:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 131 states have (on average 1.6259541984732824) internal successors, (213), 201 states have internal predecessors, (213), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2022-11-16 12:47:24,344 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 121 [2022-11-16 12:47:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:24,344 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2022-11-16 12:47:24,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:47:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2022-11-16 12:47:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 12:47:24,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:24,355 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:24,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:24,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:24,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:24,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1349401771, now seen corresponding path program 1 times [2022-11-16 12:47:24,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:24,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372093367] [2022-11-16 12:47:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:24,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079142217] [2022-11-16 12:47:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:24,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:24,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:24,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:47:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-16 12:47:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:26,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:26,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:29,938 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2100 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2100)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:47:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:30,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:47:30,284 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:47:30,284 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 [2022-11-16 12:47:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2022-11-16 12:47:30,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:32,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372093367] [2022-11-16 12:47:32,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079142217] [2022-11-16 12:47:32,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079142217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:32,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:47:32,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-16 12:47:32,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511152107] [2022-11-16 12:47:32,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:32,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:47:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:32,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:47:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=739, Unknown=1, NotChecked=54, Total=870 [2022-11-16 12:47:32,922 INFO L87 Difference]: Start difference. First operand 210 states and 225 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:47:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:38,489 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2022-11-16 12:47:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:47:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 121 [2022-11-16 12:47:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:38,491 INFO L225 Difference]: With dead ends: 209 [2022-11-16 12:47:38,492 INFO L226 Difference]: Without dead ends: 209 [2022-11-16 12:47:38,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=141, Invalid=1660, Unknown=9, NotChecked=82, Total=1892 [2022-11-16 12:47:38,493 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1283 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:38,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2712 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 1283 Unchecked, 0.2s Time] [2022-11-16 12:47:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-16 12:47:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-11-16 12:47:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 131 states have (on average 1.618320610687023) internal successors, (212), 200 states have internal predecessors, (212), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:47:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 224 transitions. [2022-11-16 12:47:38,506 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 224 transitions. Word has length 121 [2022-11-16 12:47:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:38,507 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 224 transitions. [2022-11-16 12:47:38,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:47:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 224 transitions. [2022-11-16 12:47:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-16 12:47:38,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:38,509 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:38,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:47:38,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:47:38,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -305022197, now seen corresponding path program 1 times [2022-11-16 12:47:38,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:38,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892468826] [2022-11-16 12:47:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:38,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:38,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814856175] [2022-11-16 12:47:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:38,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:47:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:47:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:39,451 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2716 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2716))) is different from true [2022-11-16 12:47:39,628 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:47:39,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-16 12:47:39,672 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2717 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2717))) is different from true [2022-11-16 12:47:39,883 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:47:39,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-16 12:47:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2022-11-16 12:47:39,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:40,745 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:47:40,747 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 [2022-11-16 12:47:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-11-16 12:47:40,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892468826] [2022-11-16 12:47:40,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814856175] [2022-11-16 12:47:40,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814856175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:40,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:40,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2022-11-16 12:47:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301986950] [2022-11-16 12:47:40,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:40,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:47:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:47:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2022-11-16 12:47:40,782 INFO L87 Difference]: Start difference. First operand 209 states and 224 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:47:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:42,186 INFO L93 Difference]: Finished difference Result 283 states and 304 transitions. [2022-11-16 12:47:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:47:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 123 [2022-11-16 12:47:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:42,189 INFO L225 Difference]: With dead ends: 283 [2022-11-16 12:47:42,189 INFO L226 Difference]: Without dead ends: 283 [2022-11-16 12:47:42,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 225 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=433, Unknown=2, NotChecked=90, Total=650 [2022-11-16 12:47:42,190 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 200 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:42,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1178 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 692 Invalid, 0 Unknown, 547 Unchecked, 1.0s Time] [2022-11-16 12:47:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-16 12:47:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 249. [2022-11-16 12:47:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 168 states have (on average 1.494047619047619) internal successors, (251), 236 states have internal predecessors, (251), 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) [2022-11-16 12:47:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 267 transitions. [2022-11-16 12:47:42,200 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 267 transitions. Word has length 123 [2022-11-16 12:47:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:42,201 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 267 transitions. [2022-11-16 12:47:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:47:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 267 transitions. [2022-11-16 12:47:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-16 12:47:42,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:42,203 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:42,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:47:42,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:47:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -305022196, now seen corresponding path program 1 times [2022-11-16 12:47:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:42,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826733913] [2022-11-16 12:47:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:42,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768881144] [2022-11-16 12:47:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:42,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:42,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:42,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:47:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:47:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:45,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:45,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:47:54,341 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3337 Int) (v_ArrVal_3338 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3337)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3338) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:47:54,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:54,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:47:54,631 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:47:54,631 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 [2022-11-16 12:47:54,917 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3339 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3339) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:47:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:55,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:47:55,174 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:47:55,174 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 [2022-11-16 12:47:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 696 proven. 160 refuted. 0 times theorem prover too weak. 359 trivial. 336 not checked. [2022-11-16 12:47:56,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:57,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826733913] [2022-11-16 12:47:57,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768881144] [2022-11-16 12:47:57,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768881144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:57,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:47:57,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-16 12:47:57,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867851854] [2022-11-16 12:47:57,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:47:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:57,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:47:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=496, Unknown=2, NotChecked=90, Total=650 [2022-11-16 12:47:57,183 INFO L87 Difference]: Start difference. First operand 249 states and 267 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:48:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:01,675 INFO L93 Difference]: Finished difference Result 249 states and 266 transitions. [2022-11-16 12:48:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:48:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-11-16 12:48:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:01,677 INFO L225 Difference]: With dead ends: 249 [2022-11-16 12:48:01,677 INFO L226 Difference]: Without dead ends: 249 [2022-11-16 12:48:01,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=8, NotChecked=134, Total=1332 [2022-11-16 12:48:01,679 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1724 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:01,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2264 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 1724 Unchecked, 0.2s Time] [2022-11-16 12:48:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-16 12:48:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-16 12:48:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 168 states have (on average 1.4880952380952381) internal successors, (250), 236 states have internal predecessors, (250), 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) [2022-11-16 12:48:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 266 transitions. [2022-11-16 12:48:01,686 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 266 transitions. Word has length 123 [2022-11-16 12:48:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:01,687 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 266 transitions. [2022-11-16 12:48:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:48:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 266 transitions. [2022-11-16 12:48:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 12:48:01,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:01,688 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:01,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:01,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:48:01,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:48:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -865753503, now seen corresponding path program 1 times [2022-11-16 12:48:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290132752] [2022-11-16 12:48:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:01,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:01,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269304883] [2022-11-16 12:48:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:01,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:01,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:48:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:48:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 352 proven. 88 refuted. 0 times theorem prover too weak. 1111 trivial. 0 not checked. [2022-11-16 12:48:02,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:02,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:48:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 352 proven. 88 refuted. 0 times theorem prover too weak. 1111 trivial. 0 not checked. [2022-11-16 12:48:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290132752] [2022-11-16 12:48:02,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269304883] [2022-11-16 12:48:02,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269304883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:02,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:02,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-16 12:48:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531220197] [2022-11-16 12:48:02,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:02,928 INFO L87 Difference]: Start difference. First operand 249 states and 266 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:48:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:03,469 INFO L93 Difference]: Finished difference Result 267 states and 291 transitions. [2022-11-16 12:48:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 124 [2022-11-16 12:48:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:03,471 INFO L225 Difference]: With dead ends: 267 [2022-11-16 12:48:03,471 INFO L226 Difference]: Without dead ends: 267 [2022-11-16 12:48:03,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 233 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:48:03,472 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 349 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:03,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1002 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:48:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-16 12:48:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 248. [2022-11-16 12:48:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 235 states have internal predecessors, (249), 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) [2022-11-16 12:48:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 265 transitions. [2022-11-16 12:48:03,481 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 265 transitions. Word has length 124 [2022-11-16 12:48:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:03,482 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 265 transitions. [2022-11-16 12:48:03,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:48:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 265 transitions. [2022-11-16 12:48:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 12:48:03,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:03,484 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:03,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:03,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:48:03,692 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:48:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1234538530, now seen corresponding path program 1 times [2022-11-16 12:48:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:03,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801445659] [2022-11-16 12:48:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:03,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972304259] [2022-11-16 12:48:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:03,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:03,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:03,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:03,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:48:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:48:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-11-16 12:48:04,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801445659] [2022-11-16 12:48:04,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972304259] [2022-11-16 12:48:04,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972304259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:04,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:04,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:04,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034316705] [2022-11-16 12:48:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:04,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:04,376 INFO L87 Difference]: Start difference. First operand 248 states and 265 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:48:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:04,538 INFO L93 Difference]: Finished difference Result 255 states and 276 transitions. [2022-11-16 12:48:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-11-16 12:48:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:04,541 INFO L225 Difference]: With dead ends: 255 [2022-11-16 12:48:04,541 INFO L226 Difference]: Without dead ends: 255 [2022-11-16 12:48:04,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:04,542 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 160 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:04,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 191 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:48:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-16 12:48:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-11-16 12:48:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 168 states have (on average 1.4761904761904763) internal successors, (248), 234 states have internal predecessors, (248), 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) [2022-11-16 12:48:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 264 transitions. [2022-11-16 12:48:04,550 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 264 transitions. Word has length 126 [2022-11-16 12:48:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:04,550 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 264 transitions. [2022-11-16 12:48:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:48:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 264 transitions. [2022-11-16 12:48:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 12:48:04,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:04,552 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:04,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:48:04,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:48:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1713867913, now seen corresponding path program 1 times [2022-11-16 12:48:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594765073] [2022-11-16 12:48:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:04,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614745414] [2022-11-16 12:48:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:04,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:04,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:04,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:48:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 12:48:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:05,660 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5215 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5215)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:48:05,809 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:05,809 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 [2022-11-16 12:48:05,833 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5216 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_5216))) is different from true [2022-11-16 12:48:05,881 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5216 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_5216))) is different from true [2022-11-16 12:48:05,889 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5216 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_5216))) is different from true [2022-11-16 12:48:05,896 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5216 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_5216))) is different from true [2022-11-16 12:48:05,923 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:05,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-11-16 12:48:05,997 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5217 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5217))) is different from true [2022-11-16 12:48:06,178 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:06,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 22 [2022-11-16 12:48:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 87 refuted. 0 times theorem prover too weak. 310 trivial. 441 not checked. [2022-11-16 12:48:06,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:07,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594765073] [2022-11-16 12:48:07,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614745414] [2022-11-16 12:48:07,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614745414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:07,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:48:07,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-16 12:48:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562134082] [2022-11-16 12:48:07,489 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:48:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:48:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2022-11-16 12:48:07,491 INFO L87 Difference]: Start difference. First operand 247 states and 264 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:48:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:08,516 INFO L93 Difference]: Finished difference Result 304 states and 330 transitions. [2022-11-16 12:48:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:48:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2022-11-16 12:48:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:08,519 INFO L225 Difference]: With dead ends: 304 [2022-11-16 12:48:08,519 INFO L226 Difference]: Without dead ends: 304 [2022-11-16 12:48:08,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=736, Unknown=6, NotChecked=366, Total=1260 [2022-11-16 12:48:08,520 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 175 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:08,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1476 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 706 Invalid, 0 Unknown, 1365 Unchecked, 0.7s Time] [2022-11-16 12:48:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-16 12:48:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 270. [2022-11-16 12:48:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 187 states have (on average 1.4438502673796791) internal successors, (270), 252 states have internal predecessors, (270), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:48:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 296 transitions. [2022-11-16 12:48:08,530 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 296 transitions. Word has length 130 [2022-11-16 12:48:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:08,531 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 296 transitions. [2022-11-16 12:48:08,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:48:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 296 transitions. [2022-11-16 12:48:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 12:48:08,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:08,533 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:08,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 12:48:08,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:48:08,741 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:48:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1713867914, now seen corresponding path program 1 times [2022-11-16 12:48:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:08,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47002226] [2022-11-16 12:48:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:08,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:08,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:08,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765619007] [2022-11-16 12:48:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:08,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:08,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:48:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-16 12:48:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:12,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:48:12,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:48:21,644 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:21,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:48:22,114 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:22,114 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 [2022-11-16 12:48:26,897 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:26,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:26,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:48:29,886 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((v_ArrVal_5867 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5867) |c_#length|) (<= (mod (* (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_5867))) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| 0) (exists ((v_ArrVal_5867 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (<= 0 v_ArrVal_5867) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5867) |c_#length|))))) is different from true [2022-11-16 12:48:34,400 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5867 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int)) (let ((.cse0 (+ (* |aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296) |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|))) (and (< 7 |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5867) |c_#length|) (<= (mod (* (div .cse0 |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_5867) (= (mod .cse0 |zalloc_or_die_calloc_model_~size#1|) 0) (< |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296)))) is different from true [2022-11-16 12:48:35,421 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:48:35,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:48:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 875 refuted. 0 times theorem prover too weak. 138 trivial. 63 not checked. [2022-11-16 12:48:41,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47002226] [2022-11-16 12:48:49,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765619007] [2022-11-16 12:48:49,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765619007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:49,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:48:49,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2022-11-16 12:48:49,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350298803] [2022-11-16 12:48:49,567 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:49,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:48:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:48:49,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2487, Unknown=18, NotChecked=202, Total=2862 [2022-11-16 12:48:49,569 INFO L87 Difference]: Start difference. First operand 270 states and 296 transitions. Second operand has 52 states, 49 states have (on average 1.816326530612245) internal successors, (89), 47 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:48:59,311 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|zalloc_or_die_calloc_model_~size#1| Int)) (and (<= (mod (* (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) (select |c_#length| |c_zalloc_or_die_calloc_model_~ptr~0#1.base|)) (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)))) (= (select |c_#valid| |c_zalloc_or_die_calloc_model_~ptr~0#1.base|) 1) (= |c_zalloc_or_die_calloc_model_~ptr~0#1.offset| 0) (or (exists ((v_ArrVal_5867 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5867) |c_#length|) (<= (mod (* (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_5867))) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| 0) (exists ((v_ArrVal_5867 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (<= 0 v_ArrVal_5867) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5867) |c_#length|)))))) is different from true [2022-11-16 12:49:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:09,577 INFO L93 Difference]: Finished difference Result 304 states and 332 transitions. [2022-11-16 12:49:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:49:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.816326530612245) internal successors, (89), 47 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 130 [2022-11-16 12:49:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:09,580 INFO L225 Difference]: With dead ends: 304 [2022-11-16 12:49:09,581 INFO L226 Difference]: Without dead ends: 304 [2022-11-16 12:49:09,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=333, Invalid=5816, Unknown=25, NotChecked=468, Total=6642 [2022-11-16 12:49:09,583 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1930 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:09,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3518 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 1930 Unchecked, 0.2s Time] [2022-11-16 12:49:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-16 12:49:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-11-16 12:49:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 218 states have (on average 1.3944954128440368) internal successors, (304), 283 states have internal predecessors, (304), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-16 12:49:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 331 transitions. [2022-11-16 12:49:09,597 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 331 transitions. Word has length 130 [2022-11-16 12:49:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:09,597 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 331 transitions. [2022-11-16 12:49:09,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.816326530612245) internal successors, (89), 47 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:49:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 331 transitions. [2022-11-16 12:49:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:49:09,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:09,600 INFO L195 NwaCegarLoop]: trace histogram [49, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:09,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:09,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:09,827 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:49:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2013004054, now seen corresponding path program 2 times [2022-11-16 12:49:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:09,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015614525] [2022-11-16 12:49:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:09,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:49:09,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222750879] [2022-11-16 12:49:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:49:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:09,881 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:09,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:49:10,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:49:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:49:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-16 12:49:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:10,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:49:10,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:49:24,093 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:49:24,093 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 [2022-11-16 12:49:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:49:29,677 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:49:29,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:49:29,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:49:32,868 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_6523 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6523) |c_#length|) (<= (mod (* (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_6523))) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| 0) (exists ((v_ArrVal_6523 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6523) |c_#length|) (<= 0 v_ArrVal_6523))))) is different from true [2022-11-16 12:49:38,075 WARN L855 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_6523 Int) (|aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int)) (let ((.cse0 (+ (* |aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296) |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|))) (and (<= (mod (* (div .cse0 |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_6523) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6523) |c_#length|) (< 8 |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|) (= (mod .cse0 |zalloc_or_die_calloc_model_~size#1|) 0) (< |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296)))) is different from true [2022-11-16 12:49:39,190 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:49:39,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:49:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 414 proven. 1006 refuted. 0 times theorem prover too weak. 119 trivial. 66 not checked. [2022-11-16 12:49:55,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:00,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015614525] [2022-11-16 12:50:00,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:50:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222750879] [2022-11-16 12:50:00,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222750879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:00,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:00,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2022-11-16 12:50:00,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328583533] [2022-11-16 12:50:00,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:00,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:50:00,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:50:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2898, Unknown=21, NotChecked=218, Total=3306 [2022-11-16 12:50:00,845 INFO L87 Difference]: Start difference. First operand 303 states and 331 transitions. Second operand has 56 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:50:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:26,016 INFO L93 Difference]: Finished difference Result 568 states and 644 transitions. [2022-11-16 12:50:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:50:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 131 [2022-11-16 12:50:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:26,020 INFO L225 Difference]: With dead ends: 568 [2022-11-16 12:50:26,021 INFO L226 Difference]: Without dead ends: 568 [2022-11-16 12:50:26,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=387, Invalid=7069, Unknown=34, NotChecked=342, Total=7832 [2022-11-16 12:50:26,024 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 157 mSDsluCounter, 7948 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 8257 SdHoareTripleChecker+Invalid, 4754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4598 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:26,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 8257 Invalid, 4754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 4598 Unchecked, 0.3s Time] [2022-11-16 12:50:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-16 12:50:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 357. [2022-11-16 12:50:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 265 states have (on average 1.3396226415094339) internal successors, (355), 332 states have internal predecessors, (355), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-16 12:50:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 397 transitions. [2022-11-16 12:50:26,041 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 397 transitions. Word has length 131 [2022-11-16 12:50:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:26,042 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 397 transitions. [2022-11-16 12:50:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:50:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 397 transitions. [2022-11-16 12:50:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:50:26,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:26,044 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:26,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:50:26,264 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:50:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1590297784, now seen corresponding path program 1 times [2022-11-16 12:50:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121545361] [2022-11-16 12:50:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:26,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:50:26,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318770061] [2022-11-16 12:50:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:26,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:26,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:26,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:50:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2022-11-16 12:50:27,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121545361] [2022-11-16 12:50:27,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:50:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318770061] [2022-11-16 12:50:27,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318770061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:27,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:27,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:50:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073227736] [2022-11-16 12:50:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:27,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:27,130 INFO L87 Difference]: Start difference. First operand 357 states and 397 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:50:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:27,382 INFO L93 Difference]: Finished difference Result 397 states and 447 transitions. [2022-11-16 12:50:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:50:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 131 [2022-11-16 12:50:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:27,386 INFO L225 Difference]: With dead ends: 397 [2022-11-16 12:50:27,386 INFO L226 Difference]: Without dead ends: 397 [2022-11-16 12:50:27,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:27,387 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 278 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:27,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 287 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:50:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-16 12:50:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 356. [2022-11-16 12:50:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 265 states have (on average 1.3358490566037735) internal successors, (354), 331 states have internal predecessors, (354), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-16 12:50:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 396 transitions. [2022-11-16 12:50:27,400 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 396 transitions. Word has length 131 [2022-11-16 12:50:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:27,400 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 396 transitions. [2022-11-16 12:50:27,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:50:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 396 transitions. [2022-11-16 12:50:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:50:27,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:27,402 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:27,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:27,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:50:27,603 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:50:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1590297785, now seen corresponding path program 1 times [2022-11-16 12:50:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:27,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294790392] [2022-11-16 12:50:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:27,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:50:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35836574] [2022-11-16 12:50:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:27,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:27,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:27,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:27,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:50:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 12:50:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:31,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:50:31,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:50:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:43,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:50:43,910 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:50:43,911 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 [2022-11-16 12:50:45,000 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7802 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7802) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:50:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:45,243 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 22 treesize of output 24 [2022-11-16 12:50:45,529 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:50:45,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:50:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 618 proven. 404 refuted. 0 times theorem prover too weak. 290 trivial. 239 not checked. [2022-11-16 12:50:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:48,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294790392] [2022-11-16 12:50:48,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:50:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35836574] [2022-11-16 12:50:48,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35836574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:48,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:48,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-11-16 12:50:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203243649] [2022-11-16 12:50:48,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:48,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:50:48,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:50:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=908, Unknown=2, NotChecked=60, Total=1056 [2022-11-16 12:50:48,585 INFO L87 Difference]: Start difference. First operand 356 states and 396 transitions. Second operand has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:50:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:54,395 INFO L93 Difference]: Finished difference Result 374 states and 418 transitions. [2022-11-16 12:50:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:50:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 131 [2022-11-16 12:50:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:54,398 INFO L225 Difference]: With dead ends: 374 [2022-11-16 12:50:54,398 INFO L226 Difference]: Without dead ends: 374 [2022-11-16 12:50:54,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=165, Invalid=1907, Unknown=2, NotChecked=88, Total=2162 [2022-11-16 12:50:54,400 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1610 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:54,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2907 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 1610 Unchecked, 0.2s Time] [2022-11-16 12:50:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-16 12:50:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-11-16 12:50:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 280 states have (on average 1.3357142857142856) internal successors, (374), 346 states have internal predecessors, (374), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-16 12:50:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 416 transitions. [2022-11-16 12:50:54,413 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 416 transitions. Word has length 131 [2022-11-16 12:50:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:54,414 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 416 transitions. [2022-11-16 12:50:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:50:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 416 transitions. [2022-11-16 12:50:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 12:50:54,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:54,416 INFO L195 NwaCegarLoop]: trace histogram [50, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:54,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:54,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:50:54,631 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:50:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash 682748668, now seen corresponding path program 3 times [2022-11-16 12:50:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:54,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87029659] [2022-11-16 12:50:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:54,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:50:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039595428] [2022-11-16 12:50:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:50:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:54,697 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:54,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:51:56,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:51:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:51:56,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:51:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 847 proven. 239 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-11-16 12:51:57,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 495 proven. 45 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2022-11-16 12:51:59,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:59,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87029659] [2022-11-16 12:51:59,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:51:59,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039595428] [2022-11-16 12:51:59,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039595428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:59,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:59,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2022-11-16 12:51:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337323796] [2022-11-16 12:51:59,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:51:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:51:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:51:59,824 INFO L87 Difference]: Start difference. First operand 371 states and 416 transitions. Second operand has 37 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:52:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:13,756 INFO L93 Difference]: Finished difference Result 466 states and 544 transitions. [2022-11-16 12:52:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:52:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 132 [2022-11-16 12:52:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:13,770 INFO L225 Difference]: With dead ends: 466 [2022-11-16 12:52:13,770 INFO L226 Difference]: Without dead ends: 421 [2022-11-16 12:52:13,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1406, Invalid=5904, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 12:52:13,774 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 671 mSDsluCounter, 3332 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:13,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 3513 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 12:52:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-16 12:52:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 386. [2022-11-16 12:52:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 298 states have (on average 1.3020134228187918) internal successors, (388), 363 states have internal predecessors, (388), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-16 12:52:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 424 transitions. [2022-11-16 12:52:13,799 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 424 transitions. Word has length 132 [2022-11-16 12:52:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:13,801 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 424 transitions. [2022-11-16 12:52:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:52:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 424 transitions. [2022-11-16 12:52:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-16 12:52:13,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:13,804 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:13,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:14,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:14,018 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:52:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -21998454, now seen corresponding path program 4 times [2022-11-16 12:52:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:14,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895938616] [2022-11-16 12:52:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:14,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:52:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329092132] [2022-11-16 12:52:14,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:52:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:14,079 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:14,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:52:19,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:52:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-16 12:52:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:20,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:52:20,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:52:20,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:52:31,526 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:52:31,526 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 [2022-11-16 12:52:31,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:52:36,337 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9253 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9253) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:52:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:52:36,553 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 22 treesize of output 24 [2022-11-16 12:52:36,601 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 12:52:36,601 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 [2022-11-16 12:52:37,911 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9255 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9255) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:52:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:52:38,285 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 22 treesize of output 24 [2022-11-16 12:52:38,326 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 12:52:38,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-11-16 12:52:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 285 proven. 488 refuted. 0 times theorem prover too weak. 308 trivial. 1184 not checked. [2022-11-16 12:52:40,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895938616] [2022-11-16 12:52:41,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:52:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329092132] [2022-11-16 12:52:41,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329092132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:41,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:41,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-11-16 12:52:41,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673678268] [2022-11-16 12:52:41,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:41,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:52:41,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:52:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1225, Unknown=2, NotChecked=142, Total=1482 [2022-11-16 12:52:41,291 INFO L87 Difference]: Start difference. First operand 386 states and 424 transitions. Second operand has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:52:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:47,099 INFO L93 Difference]: Finished difference Result 387 states and 424 transitions. [2022-11-16 12:52:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:52:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 142 [2022-11-16 12:52:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:47,103 INFO L225 Difference]: With dead ends: 387 [2022-11-16 12:52:47,103 INFO L226 Difference]: Without dead ends: 387 [2022-11-16 12:52:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=188, Invalid=2268, Unknown=2, NotChecked=194, Total=2652 [2022-11-16 12:52:47,104 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1828 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:47,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2784 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 1828 Unchecked, 0.2s Time] [2022-11-16 12:52:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-16 12:52:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2022-11-16 12:52:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 298 states have (on average 1.2986577181208054) internal successors, (387), 363 states have internal predecessors, (387), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-16 12:52:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 423 transitions. [2022-11-16 12:52:47,116 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 423 transitions. Word has length 142 [2022-11-16 12:52:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:47,116 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 423 transitions. [2022-11-16 12:52:47,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:52:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 423 transitions. [2022-11-16 12:52:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 12:52:47,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:47,119 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:47,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:47,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:47,335 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:52:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1774056250, now seen corresponding path program 1 times [2022-11-16 12:52:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754928942] [2022-11-16 12:52:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:47,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:52:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438239839] [2022-11-16 12:52:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:47,418 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:47,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:52:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:52:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2022-11-16 12:52:48,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:48,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754928942] [2022-11-16 12:52:48,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:52:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438239839] [2022-11-16 12:52:48,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438239839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:48,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:48,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918860379] [2022-11-16 12:52:48,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:48,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:48,309 INFO L87 Difference]: Start difference. First operand 386 states and 423 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:52:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:48,485 INFO L93 Difference]: Finished difference Result 391 states and 434 transitions. [2022-11-16 12:52:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 145 [2022-11-16 12:52:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:48,488 INFO L225 Difference]: With dead ends: 391 [2022-11-16 12:52:48,488 INFO L226 Difference]: Without dead ends: 391 [2022-11-16 12:52:48,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:48,489 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 146 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:48,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 196 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:52:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-16 12:52:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 385. [2022-11-16 12:52:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 298 states have (on average 1.2953020134228188) internal successors, (386), 362 states have internal predecessors, (386), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-16 12:52:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 422 transitions. [2022-11-16 12:52:48,500 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 422 transitions. Word has length 145 [2022-11-16 12:52:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:48,501 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 422 transitions. [2022-11-16 12:52:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:52:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 422 transitions. [2022-11-16 12:52:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 12:52:48,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:48,503 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:48,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:48,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:52:48,714 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:52:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1497171679, now seen corresponding path program 1 times [2022-11-16 12:52:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107336172] [2022-11-16 12:52:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:48,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:52:48,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749388925] [2022-11-16 12:52:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:48,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:48,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:48,809 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:48,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:52:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 12:52:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:50,224 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:52:50,225 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 [2022-11-16 12:52:50,326 WARN L855 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_10856 Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_10856)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:52:50,481 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 12:52:50,481 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 [2022-11-16 12:52:50,524 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10857 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_10857))) is different from true [2022-11-16 12:52:50,562 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10857 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_10857))) is different from true [2022-11-16 12:52:50,568 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10857 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_10857))) is different from true [2022-11-16 12:52:50,574 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10857 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_10857))) is different from true [2022-11-16 12:52:50,621 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 12:52:50,621 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 30 [2022-11-16 12:52:50,783 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_10858))) is different from true [2022-11-16 12:52:51,118 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-16 12:52:51,118 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 3 case distinctions, treesize of input 31 treesize of output 52 [2022-11-16 12:52:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 556 proven. 478 refuted. 0 times theorem prover too weak. 397 trivial. 834 not checked. [2022-11-16 12:52:51,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:51,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107336172] [2022-11-16 12:52:51,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:52:51,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749388925] [2022-11-16 12:52:51,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749388925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:51,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:51,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-16 12:52:51,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907016549] [2022-11-16 12:52:51,777 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:51,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:52:51,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:52:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=302, Unknown=6, NotChecked=234, Total=600 [2022-11-16 12:52:51,779 INFO L87 Difference]: Start difference. First operand 385 states and 422 transitions. Second operand has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:52:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:52,814 INFO L93 Difference]: Finished difference Result 496 states and 567 transitions. [2022-11-16 12:52:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:52:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 149 [2022-11-16 12:52:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:52,820 INFO L225 Difference]: With dead ends: 496 [2022-11-16 12:52:52,820 INFO L226 Difference]: Without dead ends: 496 [2022-11-16 12:52:52,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=526, Unknown=6, NotChecked=306, Total=930 [2022-11-16 12:52:52,825 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 158 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1661 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:52,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1709 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 1661 Unchecked, 0.7s Time] [2022-11-16 12:52:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-16 12:52:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 464. [2022-11-16 12:52:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 364 states have (on average 1.2857142857142858) internal successors, (468), 428 states have internal predecessors, (468), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2022-11-16 12:52:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 534 transitions. [2022-11-16 12:52:52,847 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 534 transitions. Word has length 149 [2022-11-16 12:52:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:52,850 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 534 transitions. [2022-11-16 12:52:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:52:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 534 transitions. [2022-11-16 12:52:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 12:52:52,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:52,852 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:52,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:53,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:53,063 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:52:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1497171678, now seen corresponding path program 1 times [2022-11-16 12:52:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:53,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143612451] [2022-11-16 12:52:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:53,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:52:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068655332] [2022-11-16 12:52:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:53,125 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:53,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:52:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-16 12:52:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:54,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:52:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:53:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:03,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:53:03,712 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:53:03,713 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 [2022-11-16 12:53:06,919 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:53:06,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:53:07,269 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 12:53:07,269 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 [2022-11-16 12:53:12,926 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 12:53:12,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-11-16 12:53:12,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:53:16,087 WARN L855 $PredicateComparison]: unable to prove that (or (and (exists ((v_ArrVal_11672 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11672)) (<= 0 v_ArrVal_11672))) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| 0)) (exists ((v_ArrVal_11672 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11672)) (<= (mod (* (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_11672) (not (= |zalloc_or_die_calloc_model_~size#1| 0))))) is different from true [2022-11-16 12:53:21,223 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11672 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| Int)) (let ((.cse0 (+ (* |aux_div_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296) |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|))) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11672)) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (<= (mod (* (div .cse0 |zalloc_or_die_calloc_model_~size#1|) |zalloc_or_die_calloc_model_~size#1|) 4294967296) v_ArrVal_11672) (< 8 |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61|) (= (mod .cse0 |zalloc_or_die_calloc_model_~size#1|) 0) (< |aux_mod_zalloc_or_die_#Ultimate.C_memset_#amount#1_61| 4294967296)))) is different from true [2022-11-16 12:53:23,442 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:53:23,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:53:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 141 proven. 1264 refuted. 0 times theorem prover too weak. 184 trivial. 676 not checked. [2022-11-16 12:53:36,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:46,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143612451] [2022-11-16 12:53:46,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:53:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068655332] [2022-11-16 12:53:46,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068655332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:46,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:53:46,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2022-11-16 12:53:46,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700781398] [2022-11-16 12:53:46,027 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:53:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:53:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2899, Unknown=17, NotChecked=218, Total=3306 [2022-11-16 12:53:46,029 INFO L87 Difference]: Start difference. First operand 464 states and 534 transitions. Second operand has 56 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:54:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:47,467 INFO L93 Difference]: Finished difference Result 560 states and 640 transitions. [2022-11-16 12:54:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:54:47,473 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 149 [2022-11-16 12:54:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:47,476 INFO L225 Difference]: With dead ends: 560 [2022-11-16 12:54:47,476 INFO L226 Difference]: Without dead ends: 560 [2022-11-16 12:54:47,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 97.1s TimeCoverageRelationStatistics Valid=439, Invalid=8276, Unknown=35, NotChecked=370, Total=9120 [2022-11-16 12:54:47,481 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 15 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4493 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2299 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:47,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4493 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 2299 Unchecked, 0.1s Time] [2022-11-16 12:54:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-16 12:54:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 540. [2022-11-16 12:54:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 435 states have (on average 1.2482758620689656) internal successors, (543), 501 states have internal predecessors, (543), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (40), 28 states have call predecessors, (40), 30 states have call successors, (40) [2022-11-16 12:54:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 613 transitions. [2022-11-16 12:54:47,500 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 613 transitions. Word has length 149 [2022-11-16 12:54:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 613 transitions. [2022-11-16 12:54:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:54:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 613 transitions. [2022-11-16 12:54:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-16 12:54:47,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:47,502 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:47,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:47,716 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:54:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 832318262, now seen corresponding path program 1 times [2022-11-16 12:54:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903961997] [2022-11-16 12:54:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:47,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:54:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234376393] [2022-11-16 12:54:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:47,792 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:54:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:54:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2022-11-16 12:54:49,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:54:49,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903961997] [2022-11-16 12:54:49,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:54:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234376393] [2022-11-16 12:54:49,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234376393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:54:49,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:54:49,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:54:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241169700] [2022-11-16 12:54:49,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:54:49,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:54:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:54:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:54:49,064 INFO L87 Difference]: Start difference. First operand 540 states and 613 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:54:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:49,317 INFO L93 Difference]: Finished difference Result 573 states and 652 transitions. [2022-11-16 12:54:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:54:49,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-16 12:54:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:49,322 INFO L225 Difference]: With dead ends: 573 [2022-11-16 12:54:49,322 INFO L226 Difference]: Without dead ends: 573 [2022-11-16 12:54:49,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:54:49,323 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 253 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:49,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 284 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:54:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-16 12:54:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 539. [2022-11-16 12:54:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 435 states have (on average 1.2459770114942528) internal successors, (542), 500 states have internal predecessors, (542), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (40), 28 states have call predecessors, (40), 30 states have call successors, (40) [2022-11-16 12:54:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 612 transitions. [2022-11-16 12:54:49,340 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 612 transitions. Word has length 150 [2022-11-16 12:54:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:49,341 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 612 transitions. [2022-11-16 12:54:49,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:54:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 612 transitions. [2022-11-16 12:54:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-16 12:54:49,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:49,343 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:49,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:49,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:49,555 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:54:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 832318263, now seen corresponding path program 1 times [2022-11-16 12:54:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313305216] [2022-11-16 12:54:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:49,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:54:49,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368035616] [2022-11-16 12:54:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:49,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:49,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:54:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 12:54:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 176 proven. 372 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2022-11-16 12:54:51,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:51,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:54:51,203 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 20 treesize of output 24 [2022-11-16 12:54:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 176 proven. 372 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2022-11-16 12:54:51,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:51,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313305216] [2022-11-16 12:54:51,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:54:51,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368035616] [2022-11-16 12:54:51,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368035616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:51,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:54:51,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:54:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992248824] [2022-11-16 12:54:51,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:54:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:54:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:54:51,734 INFO L87 Difference]: Start difference. First operand 539 states and 612 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:54:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:52,560 INFO L93 Difference]: Finished difference Result 547 states and 626 transitions. [2022-11-16 12:54:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:54:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2022-11-16 12:54:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:52,564 INFO L225 Difference]: With dead ends: 547 [2022-11-16 12:54:52,564 INFO L226 Difference]: Without dead ends: 547 [2022-11-16 12:54:52,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:54:52,565 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 611 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:52,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1423 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:54:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-16 12:54:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 538. [2022-11-16 12:54:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 435 states have (on average 1.2436781609195402) internal successors, (541), 499 states have internal predecessors, (541), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (40), 28 states have call predecessors, (40), 30 states have call successors, (40) [2022-11-16 12:54:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 611 transitions. [2022-11-16 12:54:52,594 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 611 transitions. Word has length 150 [2022-11-16 12:54:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 611 transitions. [2022-11-16 12:54:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:54:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 611 transitions. [2022-11-16 12:54:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-16 12:54:52,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:52,598 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:52,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:54:52,811 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:54:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 993934583, now seen corresponding path program 1 times [2022-11-16 12:54:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570744497] [2022-11-16 12:54:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:52,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:54:52,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535640014] [2022-11-16 12:54:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:52,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:52,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:52,880 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:52,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:54:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:54,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:54:54,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2022-11-16 12:54:54,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:54:54,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570744497] [2022-11-16 12:54:54,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:54:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535640014] [2022-11-16 12:54:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535640014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:54:54,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:54:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:54:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257192961] [2022-11-16 12:54:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:54:54,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:54:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:54:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:54:54,034 INFO L87 Difference]: Start difference. First operand 538 states and 611 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:54:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:54,192 INFO L93 Difference]: Finished difference Result 566 states and 643 transitions. [2022-11-16 12:54:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:54:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 152 [2022-11-16 12:54:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:54,195 INFO L225 Difference]: With dead ends: 566 [2022-11-16 12:54:54,195 INFO L226 Difference]: Without dead ends: 566 [2022-11-16 12:54:54,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:54:54,197 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 64 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:54,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:54:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-16 12:54:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 537. [2022-11-16 12:54:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 435 states have (on average 1.2413793103448276) internal successors, (540), 498 states have internal predecessors, (540), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (40), 28 states have call predecessors, (40), 30 states have call successors, (40) [2022-11-16 12:54:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 610 transitions. [2022-11-16 12:54:54,212 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 610 transitions. Word has length 152 [2022-11-16 12:54:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:54,213 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 610 transitions. [2022-11-16 12:54:54,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:54:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 610 transitions. [2022-11-16 12:54:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-16 12:54:54,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:54,215 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:54,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-16 12:54:54,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:54:54,429 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:54:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash 993934584, now seen corresponding path program 1 times [2022-11-16 12:54:54,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:54,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187451362] [2022-11-16 12:54:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:54,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:54:54,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80697330] [2022-11-16 12:54:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:54,505 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:54,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:54:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:54:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2022-11-16 12:54:55,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:54:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187451362] [2022-11-16 12:54:55,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:54:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80697330] [2022-11-16 12:54:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80697330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:54:55,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:54:55,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:54:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794065809] [2022-11-16 12:54:55,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:54:55,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:54:55,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:55,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:54:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:54:55,690 INFO L87 Difference]: Start difference. First operand 537 states and 610 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:54:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:55,843 INFO L93 Difference]: Finished difference Result 540 states and 617 transitions. [2022-11-16 12:54:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:54:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 152 [2022-11-16 12:54:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:55,847 INFO L225 Difference]: With dead ends: 540 [2022-11-16 12:54:55,847 INFO L226 Difference]: Without dead ends: 540 [2022-11-16 12:54:55,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:54:55,848 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:55,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 202 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:54:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-16 12:54:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 536. [2022-11-16 12:54:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 435 states have (on average 1.239080459770115) internal successors, (539), 497 states have internal predecessors, (539), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (40), 28 states have call predecessors, (40), 30 states have call successors, (40) [2022-11-16 12:54:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 609 transitions. [2022-11-16 12:54:55,882 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 609 transitions. Word has length 152 [2022-11-16 12:54:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:55,883 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 609 transitions. [2022-11-16 12:54:55,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 12:54:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 609 transitions. [2022-11-16 12:54:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 12:54:55,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:55,885 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:55,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-16 12:54:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:54:56,103 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:54:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash -948532897, now seen corresponding path program 1 times [2022-11-16 12:54:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:56,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273554062] [2022-11-16 12:54:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:56,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:56,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:54:56,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304684803] [2022-11-16 12:54:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:56,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:56,170 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:56,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:54:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:57,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:54:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:57,815 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:54:57,815 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 [2022-11-16 12:54:57,901 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15745 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_15745)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:54:58,071 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 12:54:58,071 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 [2022-11-16 12:54:58,146 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15746 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_15746))) is different from true [2022-11-16 12:54:58,186 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15746 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_15746))) is different from true [2022-11-16 12:54:58,193 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15746 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_15746))) is different from true [2022-11-16 12:54:58,199 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15746 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_15746))) is different from true [2022-11-16 12:54:58,248 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 12:54:58,248 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 30 [2022-11-16 12:54:58,451 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15747 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_15747))) is different from true [2022-11-16 12:54:58,490 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15747 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_15747))) is different from true [2022-11-16 12:54:58,497 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15747 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_15747))) is different from true [2022-11-16 12:54:58,503 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15747 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_15747))) is different from true [2022-11-16 12:54:58,569 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-16 12:54:58,570 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 3 case distinctions, treesize of input 31 treesize of output 52 [2022-11-16 12:54:58,945 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_15748 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_15748))) is different from true [2022-11-16 12:54:59,304 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-16 12:54:59,304 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 3 case distinctions, treesize of input 41 treesize of output 62 [2022-11-16 12:55:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 5 proven. 478 refuted. 0 times theorem prover too weak. 400 trivial. 1382 not checked. [2022-11-16 12:55:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:55:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:55:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273554062] [2022-11-16 12:55:02,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:55:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304684803] [2022-11-16 12:55:02,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304684803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:55:02,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:55:02,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-16 12:55:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317760423] [2022-11-16 12:55:02,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:55:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:55:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:55:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:55:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=446, Unknown=11, NotChecked=510, Total=1056 [2022-11-16 12:55:02,527 INFO L87 Difference]: Start difference. First operand 536 states and 609 transitions. Second operand has 30 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:55:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:55:03,397 INFO L93 Difference]: Finished difference Result 745 states and 891 transitions. [2022-11-16 12:55:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:55:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 156 [2022-11-16 12:55:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:55:03,403 INFO L225 Difference]: With dead ends: 745 [2022-11-16 12:55:03,404 INFO L226 Difference]: Without dead ends: 745 [2022-11-16 12:55:03,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=124, Invalid=717, Unknown=11, NotChecked=630, Total=1482 [2022-11-16 12:55:03,405 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 178 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2405 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:55:03,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1829 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 457 Invalid, 0 Unknown, 2405 Unchecked, 0.5s Time] [2022-11-16 12:55:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-16 12:55:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 715. [2022-11-16 12:55:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 585 states have (on average 1.2393162393162394) internal successors, (725), 649 states have internal predecessors, (725), 59 states have call successors, (59), 10 states have call predecessors, (59), 11 states have return successors, (78), 55 states have call predecessors, (78), 59 states have call successors, (78) [2022-11-16 12:55:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 862 transitions. [2022-11-16 12:55:03,432 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 862 transitions. Word has length 156 [2022-11-16 12:55:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:55:03,432 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 862 transitions. [2022-11-16 12:55:03,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:55:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 862 transitions. [2022-11-16 12:55:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 12:55:03,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:55:03,434 INFO L195 NwaCegarLoop]: trace histogram [60, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:55:03,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:55:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:55:03,646 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-16 12:55:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:55:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash -948532896, now seen corresponding path program 1 times [2022-11-16 12:55:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:55:03,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174758102] [2022-11-16 12:55:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:55:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:55:03,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:55:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67594427] [2022-11-16 12:55:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:55:03,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:55:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:55:03,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:55:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_452df211-fe8f-46fe-b93f-92083f6a614a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:55:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:55:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 180 conjunts are in the unsatisfiable core [2022-11-16 12:55:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:55:08,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:55:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:55:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:55:15,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:55:15,626 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:55:15,626 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 [2022-11-16 12:55:16,728 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_16583 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_16583)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-16 12:55:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:55:16,934 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 22 treesize of output 24 [2022-11-16 12:55:16,959 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:55:16,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:55:19,865 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:55:19,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 28 [2022-11-16 12:55:37,466 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:55:37,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 46 treesize of output 52 [2022-11-16 12:56:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:56:03,538 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 12:56:03,538 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 64 treesize of output 73 [2022-11-16 12:56:03,747 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:56:03,747 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 [2022-11-16 12:56:31,746 WARN L233 SmtUtils]: Spent 13.80s on a formula simplification. DAG size of input: 82 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:56:51,512 WARN L233 SmtUtils]: Spent 7.86s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:57:23,022 WARN L233 SmtUtils]: Spent 15.84s on a formula simplification. DAG size of input: 77 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:57:45,993 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 73 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:57:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 7 proven. 1532 refuted. 0 times theorem prover too weak. 178 trivial. 548 not checked. [2022-11-16 12:57:52,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:58:05,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:58:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174758102] [2022-11-16 12:58:05,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:58:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67594427] [2022-11-16 12:58:05,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67594427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:58:05,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:58:05,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2022-11-16 12:58:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866827614] [2022-11-16 12:58:05,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 12:58:05,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 12:58:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:58:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 12:58:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4297, Unknown=59, NotChecked=132, Total=4692 [2022-11-16 12:58:05,079 INFO L87 Difference]: Start difference. First operand 715 states and 862 transitions. Second operand has 64 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 58 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 13:00:23,677 WARN L233 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 92 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 13:01:23,017 WARN L233 SmtUtils]: Spent 43.75s on a formula simplification. DAG size of input: 98 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)