./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8 --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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- 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-2329fc7 [2022-12-13 14:21:27,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:21:27,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:21:27,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:21:27,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:21:27,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:21:27,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:21:27,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:21:27,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:21:27,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:21:27,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:21:27,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:21:27,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:21:27,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:21:27,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:21:27,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:21:27,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:21:27,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:21:27,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:21:27,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:21:27,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:21:27,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:21:27,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:21:27,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:21:27,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:21:27,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:21:27,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:21:27,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:21:27,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:21:27,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:21:27,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:21:27,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:21:27,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:21:27,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:21:27,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:21:27,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:21:27,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:21:27,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:21:27,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:21:27,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:21:27,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:21:27,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:21:27,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:21:27,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:21:27,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:21:27,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:21:27,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:21:27,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:21:27,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:21:27,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:21:27,127 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:21:27,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:21:27,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:21:27,128 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:21:27,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:21:27,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:21:27,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:21:27,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:21:27,129 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:21:27,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:21:27,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:21:27,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:21:27,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:21:27,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:21:27,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:21:27,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:21:27,132 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2022-12-13 14:21:27,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:21:27,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:21:27,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:21:27,338 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:21:27,338 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:21:27,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/memsafety/test-0235-3.i [2022-12-13 14:21:29,884 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:21:30,093 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:21:30,094 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/sv-benchmarks/c/memsafety/test-0235-3.i [2022-12-13 14:21:30,106 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/data/bc9b604e7/7d25ce6e660c44eebaa173bff76a0408/FLAGac75e7436 [2022-12-13 14:21:30,455 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/data/bc9b604e7/7d25ce6e660c44eebaa173bff76a0408 [2022-12-13 14:21:30,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:21:30,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:21:30,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:21:30,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:21:30,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:21:30,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1903d1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30, skipping insertion in model container [2022-12-13 14:21:30,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:21:30,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:21:30,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:21:30,731 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:21:30,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:21:30,787 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:21:30,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30 WrapperNode [2022-12-13 14:21:30,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:21:30,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:21:30,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:21:30,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:21:30,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,825 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2022-12-13 14:21:30,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:21:30,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:21:30,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:21:30,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:21:30,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:21:30,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:21:30,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:21:30,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:21:30,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (1/1) ... [2022-12-13 14:21:30,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:21:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:30,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:21:30,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:21:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:21:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:21:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 14:21:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-12-13 14:21:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-12-13 14:21:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:21:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:21:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:21:31,017 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:21:31,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:21:31,455 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:21:31,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:21:31,461 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 14:21:31,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:21:31 BoogieIcfgContainer [2022-12-13 14:21:31,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:21:31,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:21:31,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:21:31,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:21:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:21:30" (1/3) ... [2022-12-13 14:21:31,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb10e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:21:31, skipping insertion in model container [2022-12-13 14:21:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:30" (2/3) ... [2022-12-13 14:21:31,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb10e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:21:31, skipping insertion in model container [2022-12-13 14:21:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:21:31" (3/3) ... [2022-12-13 14:21:31,468 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2022-12-13 14:21:31,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:21:31,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2022-12-13 14:21:31,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:21:31,519 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=PETRI_NET, 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;@5c323d3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:21:31,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2022-12-13 14:21:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-13 14:21:31,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:31,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-13 14:21:31,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-12-13 14:21:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:31,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459859808] [2022-12-13 14:21:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:21:31,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459859808] [2022-12-13 14:21:31,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459859808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:21:31,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:21:31,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:21:31,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529610036] [2022-12-13 14:21:31,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:21:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:21:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:21:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:21:31,694 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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) [2022-12-13 14:21:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:31,723 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2022-12-13 14:21:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:21:31,725 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 [2022-12-13 14:21:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:31,731 INFO L225 Difference]: With dead ends: 243 [2022-12-13 14:21:31,732 INFO L226 Difference]: Without dead ends: 241 [2022-12-13 14:21:31,733 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 [2022-12-13 14:21:31,735 INFO L413 NwaCegarLoop]: 274 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, 274 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 [2022-12-13 14:21:31,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:21:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-13 14:21:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-12-13 14:21:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2022-12-13 14:21:31,784 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2022-12-13 14:21:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:31,784 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2022-12-13 14:21:31,784 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) [2022-12-13 14:21:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2022-12-13 14:21:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:21:31,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:31,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:21:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:21:31,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2022-12-13 14:21:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703459878] [2022-12-13 14:21:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:31,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433701833] [2022-12-13 14:21:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:31,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:31,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:31,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:21:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:21:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:31,926 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 [2022-12-13 14:21:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:21:31,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:21:31,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:31,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703459878] [2022-12-13 14:21:31,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433701833] [2022-12-13 14:21:31,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433701833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:21:31,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:21:31,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:21:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203840428] [2022-12-13 14:21:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:21:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:21:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:21:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:21:31,940 INFO L87 Difference]: Start difference. First operand 241 states and 272 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) [2022-12-13 14:21:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:32,088 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2022-12-13 14:21:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:21:32,088 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 [2022-12-13 14:21:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:32,090 INFO L225 Difference]: With dead ends: 240 [2022-12-13 14:21:32,090 INFO L226 Difference]: Without dead ends: 240 [2022-12-13 14:21:32,090 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 [2022-12-13 14:21:32,091 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:32,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:21:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-13 14:21:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-12-13 14:21:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2022-12-13 14:21:32,102 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2022-12-13 14:21:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:32,102 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2022-12-13 14:21:32,102 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) [2022-12-13 14:21:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2022-12-13 14:21:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 14:21:32,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:32,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:21:32,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:21:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 14:21:32,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2022-12-13 14:21:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502142001] [2022-12-13 14:21:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:32,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397176414] [2022-12-13 14:21:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:32,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:32,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:32,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:32,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:21:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:21:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:32,535 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 [2022-12-13 14:21:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:21:32,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:21:32,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502142001] [2022-12-13 14:21:32,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397176414] [2022-12-13 14:21:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397176414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:21:32,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:21:32,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:21:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943506300] [2022-12-13 14:21:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:21:32,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:21:32,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:21:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:21:32,561 INFO L87 Difference]: Start difference. First operand 240 states and 271 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) [2022-12-13 14:21:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:32,722 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2022-12-13 14:21:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:21:32,723 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 [2022-12-13 14:21:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:32,724 INFO L225 Difference]: With dead ends: 249 [2022-12-13 14:21:32,724 INFO L226 Difference]: Without dead ends: 249 [2022-12-13 14:21:32,724 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 [2022-12-13 14:21:32,725 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 16 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:32,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 709 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:21:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-12-13 14:21:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-12-13 14:21:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 145 states have (on average 1.7517241379310344) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2022-12-13 14:21:32,734 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 7 [2022-12-13 14:21:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:32,735 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2022-12-13 14:21:32,735 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) [2022-12-13 14:21:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2022-12-13 14:21:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 14:21:32,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:32,736 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] [2022-12-13 14:21:32,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:21:32,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:32,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1283052409, now seen corresponding path program 1 times [2022-12-13 14:21:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946080384] [2022-12-13 14:21:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:33,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:33,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911842593] [2022-12-13 14:21:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:33,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:33,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:33,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:21:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:21:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:33,281 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 [2022-12-13 14:21:33,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:21:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-13 14:21:33,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:21:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946080384] [2022-12-13 14:21:33,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:33,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911842593] [2022-12-13 14:21:33,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911842593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:21:33,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:21:33,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:21:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503488780] [2022-12-13 14:21:33,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:21:33,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:21:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:21:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:21:33,565 INFO L87 Difference]: Start difference. First operand 249 states and 280 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) [2022-12-13 14:21:37,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:21:40,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:21:43,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:21:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:43,603 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-12-13 14:21:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:21:43,605 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 [2022-12-13 14:21:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:43,606 INFO L225 Difference]: With dead ends: 261 [2022-12-13 14:21:43,606 INFO L226 Difference]: Without dead ends: 251 [2022-12-13 14:21:43,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:21:43,607 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 19 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:43,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 943 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2022-12-13 14:21:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-12-13 14:21:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-12-13 14:21:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 234 states have internal predecessors, (256), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2022-12-13 14:21:43,613 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 66 [2022-12-13 14:21:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:43,613 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2022-12-13 14:21:43,614 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) [2022-12-13 14:21:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2022-12-13 14:21:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 14:21:43,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:43,615 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] [2022-12-13 14:21:43,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:21:43,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:43,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash 370417648, now seen corresponding path program 1 times [2022-12-13 14:21:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:43,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711915075] [2022-12-13 14:21:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:43,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:43,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37394637] [2022-12-13 14:21:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:43,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:43,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:43,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:43,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:21:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 14:21:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:44,113 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 [2022-12-13 14:21:44,138 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 [2022-12-13 14:21:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 14:21:44,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:21:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-13 14:21:44,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:44,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711915075] [2022-12-13 14:21:44,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:44,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37394637] [2022-12-13 14:21:44,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37394637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:21:44,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:21:44,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-12-13 14:21:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942840902] [2022-12-13 14:21:44,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:21:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:21:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:21:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:21:44,398 INFO L87 Difference]: Start difference. First operand 251 states and 282 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) [2022-12-13 14:21:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:44,774 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2022-12-13 14:21:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:21:44,774 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 [2022-12-13 14:21:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:44,775 INFO L225 Difference]: With dead ends: 277 [2022-12-13 14:21:44,775 INFO L226 Difference]: Without dead ends: 257 [2022-12-13 14:21:44,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:21:44,776 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 28 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:44,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1889 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:21:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-13 14:21:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-12-13 14:21:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2022-12-13 14:21:44,783 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 71 [2022-12-13 14:21:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:44,783 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2022-12-13 14:21:44,783 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) [2022-12-13 14:21:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2022-12-13 14:21:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 14:21:44,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:44,784 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] [2022-12-13 14:21:44,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:21:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:44,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 955905991, now seen corresponding path program 2 times [2022-12-13 14:21:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841550887] [2022-12-13 14:21:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:45,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185514582] [2022-12-13 14:21:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:21:45,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:45,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:45,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:21:45,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:21:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:21:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 14:21:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:45,685 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 [2022-12-13 14:21:45,716 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 [2022-12-13 14:21:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 220 proven. 36 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 14:21:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:21:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-12-13 14:21:46,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841550887] [2022-12-13 14:21:46,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185514582] [2022-12-13 14:21:46,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185514582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:21:46,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:21:46,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-12-13 14:21:46,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217196197] [2022-12-13 14:21:46,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:21:46,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:21:46,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:21:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:21:46,164 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 14:21:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:46,710 INFO L93 Difference]: Finished difference Result 285 states and 320 transitions. [2022-12-13 14:21:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:21:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-12-13 14:21:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:46,712 INFO L225 Difference]: With dead ends: 285 [2022-12-13 14:21:46,712 INFO L226 Difference]: Without dead ends: 265 [2022-12-13 14:21:46,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-12-13 14:21:46,713 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 33 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:46,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2924 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:21:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-12-13 14:21:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-12-13 14:21:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 161 states have (on average 1.6770186335403727) internal successors, (270), 248 states have internal predecessors, (270), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2022-12-13 14:21:46,722 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 86 [2022-12-13 14:21:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:46,723 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2022-12-13 14:21:46,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 14:21:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2022-12-13 14:21:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 14:21:46,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:46,725 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] [2022-12-13 14:21:46,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:21:46,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:46,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:46,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1008033017, now seen corresponding path program 3 times [2022-12-13 14:21:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:46,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017434507] [2022-12-13 14:21:46,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:46,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:46,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:46,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755072847] [2022-12-13 14:21:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:21:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:46,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:46,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:21:47,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:21:47,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:21:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 14:21:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:47,135 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 [2022-12-13 14:21:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2022-12-13 14:21:47,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:21:47,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017434507] [2022-12-13 14:21:47,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755072847] [2022-12-13 14:21:47,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755072847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:21:47,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:21:47,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:21:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120874422] [2022-12-13 14:21:47,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:21:47,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:21:47,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:21:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:21:47,154 INFO L87 Difference]: Start difference. First operand 265 states and 296 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) [2022-12-13 14:21:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:47,269 INFO L93 Difference]: Finished difference Result 264 states and 295 transitions. [2022-12-13 14:21:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:21:47,269 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 [2022-12-13 14:21:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:47,271 INFO L225 Difference]: With dead ends: 264 [2022-12-13 14:21:47,271 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 14:21:47,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:21:47,272 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 16 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:47,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 728 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:21:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 14:21:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-12-13 14:21:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.670807453416149) internal successors, (269), 247 states have internal predecessors, (269), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2022-12-13 14:21:47,280 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 106 [2022-12-13 14:21:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:47,281 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2022-12-13 14:21:47,281 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) [2022-12-13 14:21:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2022-12-13 14:21:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 14:21:47,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:47,283 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] [2022-12-13 14:21:47,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:21:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:47,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595626, now seen corresponding path program 1 times [2022-12-13 14:21:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566566354] [2022-12-13 14:21:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:47,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502856275] [2022-12-13 14:21:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:47,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:47,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:21:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:21:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:47,868 WARN L859 $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 [2022-12-13 14:21:47,969 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 14:21:47,969 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 [2022-12-13 14:21:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2022-12-13 14:21:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:21:48,204 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 14:21:48,205 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 [2022-12-13 14:21:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-12-13 14:21:48,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566566354] [2022-12-13 14:21:48,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:21:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502856275] [2022-12-13 14:21:48,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502856275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:21:48,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:21:48,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-12-13 14:21:48,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256262165] [2022-12-13 14:21:48,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:21:48,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:21:48,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:21:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2022-12-13 14:21:48,224 INFO L87 Difference]: Start difference. First operand 264 states and 295 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) [2022-12-13 14:21:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:21:49,009 INFO L93 Difference]: Finished difference Result 422 states and 490 transitions. [2022-12-13 14:21:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:21:49,010 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 [2022-12-13 14:21:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:21:49,013 INFO L225 Difference]: With dead ends: 422 [2022-12-13 14:21:49,014 INFO L226 Difference]: Without dead ends: 422 [2022-12-13 14:21:49,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2022-12-13 14:21:49,015 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 359 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:21:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1814 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1233 Invalid, 0 Unknown, 449 Unchecked, 0.6s Time] [2022-12-13 14:21:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-12-13 14:21:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 262. [2022-12-13 14:21:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.6583850931677018) internal successors, (267), 245 states have internal predecessors, (267), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:21:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2022-12-13 14:21:49,027 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 121 [2022-12-13 14:21:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:21:49,028 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2022-12-13 14:21:49,028 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) [2022-12-13 14:21:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2022-12-13 14:21:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 14:21:49,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:21:49,030 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] [2022-12-13 14:21:49,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:21:49,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 14:21:49,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:21:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595627, now seen corresponding path program 1 times [2022-12-13 14:21:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:49,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975490436] [2022-12-13 14:21:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:49,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:21:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490897743] [2022-12-13 14:21:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:49,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:49,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:21:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 14:21:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:57,718 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 [2022-12-13 14:22:11,725 WARN L859 $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 [2022-12-13 14:22:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:22:11,885 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 16 treesize of output 18 [2022-12-13 14:22:11,991 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:22:11,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 14:22:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2022-12-13 14:22:12,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:16,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975490436] [2022-12-13 14:22:16,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:22:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490897743] [2022-12-13 14:22:16,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490897743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:22:16,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:22:16,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-12-13 14:22:16,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715791884] [2022-12-13 14:22:16,988 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:22:16,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:22:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=5, NotChecked=54, Total=870 [2022-12-13 14:22:16,990 INFO L87 Difference]: Start difference. First operand 262 states and 293 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) [2022-12-13 14:22:19,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:21,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:25,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:29,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:33,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:35,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:37,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:42,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:44,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:22:59,584 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:23:08,795 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:23:18,501 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:23:26,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:28,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:30,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:23:32,054 INFO L93 Difference]: Finished difference Result 418 states and 488 transitions. [2022-12-13 14:23:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:23:32,055 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 [2022-12-13 14:23:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:23:32,057 INFO L225 Difference]: With dead ends: 418 [2022-12-13 14:23:32,057 INFO L226 Difference]: Without dead ends: 418 [2022-12-13 14:23:32,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=187, Invalid=1611, Unknown=12, NotChecked=82, Total=1892 [2022-12-13 14:23:32,058 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 383 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 5427 mSolverCounterSat, 44 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 5905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5427 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:23:32,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1547 Invalid, 5905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5427 Invalid, 12 Unknown, 422 Unchecked, 32.7s Time] [2022-12-13 14:23:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-12-13 14:23:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2022-12-13 14:23:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 243 states have internal predecessors, (265), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:23:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2022-12-13 14:23:32,068 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 121 [2022-12-13 14:23:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:23:32,069 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2022-12-13 14:23:32,069 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) [2022-12-13 14:23:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2022-12-13 14:23:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-13 14:23:32,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:23:32,071 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] [2022-12-13 14:23:32,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 14:23:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 14:23:32,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:23:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:23:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870859, now seen corresponding path program 1 times [2022-12-13 14:23:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:23:32,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948728474] [2022-12-13 14:23:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:23:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:23:32,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:23:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773477168] [2022-12-13 14:23:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:23:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:23:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:23:32,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:23:32,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:23:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:23:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 14:23:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:23:32,704 WARN L859 $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 [2022-12-13 14:23:32,768 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 14:23:32,768 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 [2022-12-13 14:23:32,782 WARN L859 $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 [2022-12-13 14:23:32,845 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 14:23:32,845 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 [2022-12-13 14:23:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2022-12-13 14:23:32,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:23:33,204 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 14:23:33,204 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 [2022-12-13 14:23:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-12-13 14:23:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:23:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948728474] [2022-12-13 14:23:33,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:23:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773477168] [2022-12-13 14:23:33,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773477168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:23:33,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:23:33,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2022-12-13 14:23:33,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895243723] [2022-12-13 14:23:33,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:23:33,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:23:33,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:23:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:23:33,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2022-12-13 14:23:33,215 INFO L87 Difference]: Start difference. First operand 260 states and 291 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) [2022-12-13 14:23:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:23:34,108 INFO L93 Difference]: Finished difference Result 417 states and 485 transitions. [2022-12-13 14:23:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:23:34,108 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 [2022-12-13 14:23:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:23:34,109 INFO L225 Difference]: With dead ends: 417 [2022-12-13 14:23:34,109 INFO L226 Difference]: Without dead ends: 417 [2022-12-13 14:23:34,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 224 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2022-12-13 14:23:34,110 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 579 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:23:34,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1867 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 916 Unchecked, 0.7s Time] [2022-12-13 14:23:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-12-13 14:23:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 257. [2022-12-13 14:23:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.6273291925465838) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:23:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2022-12-13 14:23:34,116 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 123 [2022-12-13 14:23:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:23:34,116 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2022-12-13 14:23:34,116 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) [2022-12-13 14:23:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2022-12-13 14:23:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-13 14:23:34,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:23:34,117 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] [2022-12-13 14:23:34,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:23:34,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 14:23:34,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:23:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:23:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870860, now seen corresponding path program 1 times [2022-12-13 14:23:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:23:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707113234] [2022-12-13 14:23:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:23:34,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:23:34,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:23:34,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033869587] [2022-12-13 14:23:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:23:34,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:23:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:23:34,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:23:34,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:23:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:23:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 14:23:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:23:35,833 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 [2022-12-13 14:23:45,801 WARN L859 $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 (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3337) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3338)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-13 14:23:45,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:23:45,975 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 16 treesize of output 18 [2022-12-13 14:23:46,015 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:23:46,015 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 [2022-12-13 14:23:46,063 WARN L859 $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 [2022-12-13 14:23:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:23:46,140 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 16 treesize of output 18 [2022-12-13 14:23:46,145 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:23:46,145 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 [2022-12-13 14:23:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 722 proven. 125 refuted. 0 times theorem prover too weak. 386 trivial. 318 not checked. [2022-12-13 14:23:46,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:23:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:23:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707113234] [2022-12-13 14:23:47,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:23:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033869587] [2022-12-13 14:23:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033869587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:23:47,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:23:47,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-12-13 14:23:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230514957] [2022-12-13 14:23:47,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:23:47,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:23:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:23:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:23:47,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=410, Unknown=4, NotChecked=82, Total=552 [2022-12-13 14:23:47,517 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-12-13 14:23:49,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:51,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:53,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:23:57,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:24:00,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:24:02,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:24:04,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:24:24,908 WARN L233 SmtUtils]: Spent 12.42s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:24:41,007 WARN L233 SmtUtils]: Spent 15.05s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:25:04,199 WARN L233 SmtUtils]: Spent 21.95s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:25:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:25:10,311 INFO L93 Difference]: Finished difference Result 406 states and 473 transitions. [2022-12-13 14:25:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 14:25:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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 [2022-12-13 14:25:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:25:10,313 INFO L225 Difference]: With dead ends: 406 [2022-12-13 14:25:10,313 INFO L226 Difference]: Without dead ends: 406 [2022-12-13 14:25:10,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=149, Invalid=974, Unknown=7, NotChecked=130, Total=1260 [2022-12-13 14:25:10,314 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 484 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 61 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:25:10,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 861 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3505 Invalid, 7 Unknown, 610 Unchecked, 19.7s Time] [2022-12-13 14:25:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-12-13 14:25:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 255. [2022-12-13 14:25:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 161 states have (on average 1.6149068322981366) internal successors, (260), 238 states have internal predecessors, (260), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:25:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2022-12-13 14:25:10,322 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 123 [2022-12-13 14:25:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:25:10,322 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2022-12-13 14:25:10,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-12-13 14:25:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2022-12-13 14:25:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 14:25:10,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:25:10,323 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] [2022-12-13 14:25:10,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:25:10,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 14:25:10,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:25:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:25:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835145, now seen corresponding path program 1 times [2022-12-13 14:25:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:25:10,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231346733] [2022-12-13 14:25:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:10,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:25:10,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:25:10,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28847149] [2022-12-13 14:25:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:10,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:10,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:25:10,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:25:10,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:25:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 14:25:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:25:10,895 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3979 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_3979)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-13 14:25:10,941 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:25:10,941 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 [2022-12-13 14:25:10,949 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_3980))) is different from true [2022-12-13 14:25:10,964 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_3980))) is different from true [2022-12-13 14:25:10,967 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_3980))) is different from true [2022-12-13 14:25:10,969 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_3980))) is different from true [2022-12-13 14:25:10,979 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:25:10,979 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 [2022-12-13 14:25:11,013 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3981 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3981))) is different from true [2022-12-13 14:25:11,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:25:11,083 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 [2022-12-13 14:25:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 87 refuted. 0 times theorem prover too weak. 310 trivial. 441 not checked. [2022-12-13 14:25:11,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:25:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:25:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231346733] [2022-12-13 14:25:11,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:25:11,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28847149] [2022-12-13 14:25:11,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28847149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:25:11,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:25:11,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-13 14:25:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348372085] [2022-12-13 14:25:11,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:25:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:25:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:25:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:25:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2022-12-13 14:25:11,700 INFO L87 Difference]: Start difference. First operand 255 states and 286 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) [2022-12-13 14:25:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:25:12,830 INFO L93 Difference]: Finished difference Result 475 states and 557 transitions. [2022-12-13 14:25:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:25:12,830 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 [2022-12-13 14:25:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:25:12,832 INFO L225 Difference]: With dead ends: 475 [2022-12-13 14:25:12,832 INFO L226 Difference]: Without dead ends: 475 [2022-12-13 14:25:12,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=779, Unknown=6, NotChecked=378, Total=1332 [2022-12-13 14:25:12,832 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 606 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 70 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 1894 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:25:12,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1995 Invalid, 3419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1418 Invalid, 37 Unknown, 1894 Unchecked, 0.9s Time] [2022-12-13 14:25:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-12-13 14:25:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 323. [2022-12-13 14:25:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 224 states have (on average 1.6517857142857142) internal successors, (370), 299 states have internal predecessors, (370), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:25:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 427 transitions. [2022-12-13 14:25:12,841 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 427 transitions. Word has length 130 [2022-12-13 14:25:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:25:12,841 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 427 transitions. [2022-12-13 14:25:12,841 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) [2022-12-13 14:25:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 427 transitions. [2022-12-13 14:25:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 14:25:12,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:25:12,842 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] [2022-12-13 14:25:12,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:25:13,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:13,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:25:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:25:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835146, now seen corresponding path program 1 times [2022-12-13 14:25:13,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:25:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944821047] [2022-12-13 14:25:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:25:13,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:25:13,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738975449] [2022-12-13 14:25:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:13,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:13,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:25:13,096 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:25:13,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:25:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:18,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-13 14:25:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:25:18,256 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 [2022-12-13 14:25:30,137 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:25:30,137 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 [2022-12-13 14:25:30,406 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:25:30,406 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 [2022-12-13 14:25:34,097 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 14:25:34,098 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 [2022-12-13 14:25:34,153 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 16 treesize of output 18 [2022-12-13 14:25:36,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= (mod .cse0 4294967296) v_ArrVal_4631) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2022-12-13 14:25:38,933 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (< 7 .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= .cse0 v_ArrVal_4631)))) is different from true [2022-12-13 14:25:39,572 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:25:39,572 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 [2022-12-13 14:25:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 875 refuted. 0 times theorem prover too weak. 138 trivial. 63 not checked. [2022-12-13 14:25:41,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:25:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:25:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944821047] [2022-12-13 14:25:43,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:25:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738975449] [2022-12-13 14:25:43,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738975449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:25:43,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:25:43,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2022-12-13 14:25:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463542025] [2022-12-13 14:25:44,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:25:44,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 14:25:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:25:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 14:25:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2485, Unknown=19, NotChecked=202, Total=2862 [2022-12-13 14:25:44,002 INFO L87 Difference]: Start difference. First operand 323 states and 427 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) [2022-12-13 14:25:46,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:25:48,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:25:52,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:25:54,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:25:58,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:02,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:06,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:11,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:15,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:19,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:23,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:26:39,027 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:26:47,368 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 62 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:26:56,333 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 79 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:27:06,278 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 96 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:27:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:27:35,018 INFO L93 Difference]: Finished difference Result 407 states and 484 transitions. [2022-12-13 14:27:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 14:27:35,019 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 [2022-12-13 14:27:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:27:35,020 INFO L225 Difference]: With dead ends: 407 [2022-12-13 14:27:35,020 INFO L226 Difference]: Without dead ends: 407 [2022-12-13 14:27:35,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 99.3s TimeCoverageRelationStatistics Valid=370, Invalid=4579, Unknown=29, NotChecked=278, Total=5256 [2022-12-13 14:27:35,021 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 728 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 9275 mSolverCounterSat, 75 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 10239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 9275 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 878 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:27:35,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2284 Invalid, 10239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 9275 Invalid, 11 Unknown, 878 Unchecked, 32.6s Time] [2022-12-13 14:27:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-13 14:27:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 320. [2022-12-13 14:27:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 296 states have internal predecessors, (367), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:27:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 424 transitions. [2022-12-13 14:27:35,028 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 424 transitions. Word has length 130 [2022-12-13 14:27:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:27:35,029 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 424 transitions. [2022-12-13 14:27:35,029 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) [2022-12-13 14:27:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 424 transitions. [2022-12-13 14:27:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-13 14:27:35,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:27:35,030 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] [2022-12-13 14:27:35,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:27:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:35,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:27:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2091151161, now seen corresponding path program 1 times [2022-12-13 14:27:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:35,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567779300] [2022-12-13 14:27:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:35,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:27:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2650072] [2022-12-13 14:27:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:35,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:35,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:35,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:35,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:27:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 14:27:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:38,274 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 [2022-12-13 14:27:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:54,541 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 16 treesize of output 18 [2022-12-13 14:27:54,553 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:27:54,553 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 [2022-12-13 14:27:55,366 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_5274 Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5274)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-13 14:27:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:55,491 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 16 treesize of output 18 [2022-12-13 14:27:55,556 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 14:27:55,556 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 [2022-12-13 14:27:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 618 proven. 404 refuted. 0 times theorem prover too weak. 290 trivial. 239 not checked. [2022-12-13 14:27:56,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567779300] [2022-12-13 14:27:59,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:27:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2650072] [2022-12-13 14:27:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2650072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:59,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:27:59,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-12-13 14:27:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316054470] [2022-12-13 14:27:59,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:59,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 14:27:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 14:27:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=903, Unknown=7, NotChecked=60, Total=1056 [2022-12-13 14:27:59,393 INFO L87 Difference]: Start difference. First operand 320 states and 424 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) [2022-12-13 14:28:01,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:03,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:05,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:07,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:11,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:14,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:16,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:20,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:24,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:28,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:30,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:28:52,056 WARN L233 SmtUtils]: Spent 12.87s on a formula simplification. DAG size of input: 57 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:29:08,395 WARN L233 SmtUtils]: Spent 15.44s on a formula simplification. DAG size of input: 66 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:29:31,128 WARN L233 SmtUtils]: Spent 22.36s on a formula simplification. DAG size of input: 75 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:29:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:29:36,824 INFO L93 Difference]: Finished difference Result 407 states and 484 transitions. [2022-12-13 14:29:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:29:36,824 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 [2022-12-13 14:29:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:29:36,825 INFO L225 Difference]: With dead ends: 407 [2022-12-13 14:29:36,825 INFO L226 Difference]: Without dead ends: 407 [2022-12-13 14:29:36,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 88.1s TimeCoverageRelationStatistics Valid=207, Invalid=1764, Unknown=13, NotChecked=86, Total=2070 [2022-12-13 14:29:36,826 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 348 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 4962 mSolverCounterSat, 43 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 5314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4962 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:29:36,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1483 Invalid, 5314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4962 Invalid, 11 Unknown, 298 Unchecked, 28.6s Time] [2022-12-13 14:29:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-13 14:29:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 319. [2022-12-13 14:29:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 224 states have (on average 1.6339285714285714) internal successors, (366), 295 states have internal predecessors, (366), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:29:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 423 transitions. [2022-12-13 14:29:36,833 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 423 transitions. Word has length 131 [2022-12-13 14:29:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:29:36,833 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 423 transitions. [2022-12-13 14:29:36,833 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) [2022-12-13 14:29:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 423 transitions. [2022-12-13 14:29:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-13 14:29:36,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:29:36,834 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, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:36,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 14:29:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:29:37,035 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:29:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash 389893025, now seen corresponding path program 1 times [2022-12-13 14:29:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301360647] [2022-12-13 14:29:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:37,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:37,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:29:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29879521] [2022-12-13 14:29:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:37,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:37,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:37,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:29:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 14:29:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:37,710 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:29:37,711 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 [2022-12-13 14:29:37,892 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-13 14:29:37,892 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 [2022-12-13 14:29:37,944 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5940 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_5940))) is different from true [2022-12-13 14:29:37,960 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5940 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_5940))) is different from true [2022-12-13 14:29:37,963 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5940 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_5940))) is different from true [2022-12-13 14:29:37,966 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5940 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_5940))) is different from true [2022-12-13 14:29:37,987 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 14:29:37,987 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 [2022-12-13 14:29:38,084 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5941 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5941))) is different from true [2022-12-13 14:29:38,195 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-13 14:29:38,195 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 [2022-12-13 14:29:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 536 proven. 437 refuted. 0 times theorem prover too weak. 223 trivial. 355 not checked. [2022-12-13 14:29:38,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:38,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301360647] [2022-12-13 14:29:38,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:29:38,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29879521] [2022-12-13 14:29:38,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29879521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:38,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:29:38,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-12-13 14:29:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644553750] [2022-12-13 14:29:38,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:29:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:29:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=720, Unknown=5, NotChecked=290, Total=1122 [2022-12-13 14:29:38,527 INFO L87 Difference]: Start difference. First operand 319 states and 423 transitions. Second operand has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 14:29:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:29:40,832 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-12-13 14:29:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:29:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2022-12-13 14:29:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:29:40,834 INFO L225 Difference]: With dead ends: 408 [2022-12-13 14:29:40,834 INFO L226 Difference]: Without dead ends: 408 [2022-12-13 14:29:40,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1344, Unknown=5, NotChecked=400, Total=1980 [2022-12-13 14:29:40,835 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 685 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 96 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 2152 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:29:40,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2965 Invalid, 4708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2414 Invalid, 46 Unknown, 2152 Unchecked, 2.0s Time] [2022-12-13 14:29:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-13 14:29:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 316. [2022-12-13 14:29:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 224 states have (on average 1.6205357142857142) internal successors, (363), 292 states have internal predecessors, (363), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:29:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 420 transitions. [2022-12-13 14:29:40,841 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 420 transitions. Word has length 137 [2022-12-13 14:29:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:29:40,841 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 420 transitions. [2022-12-13 14:29:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 14:29:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 420 transitions. [2022-12-13 14:29:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-13 14:29:40,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:29:40,846 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, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:40,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:29:41,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:29:41,047 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:29:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash 389893026, now seen corresponding path program 1 times [2022-12-13 14:29:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:41,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155223588] [2022-12-13 14:29:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:41,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:29:41,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372032866] [2022-12-13 14:29:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:41,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:41,122 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:41,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:29:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-13 14:29:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:41,554 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 [2022-12-13 14:29:51,223 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:29:51,223 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 [2022-12-13 14:29:51,389 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:29:51,390 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 [2022-12-13 14:29:54,370 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-13 14:29:54,371 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 [2022-12-13 14:29:54,458 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 16 treesize of output 18 [2022-12-13 14:29:56,998 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-13 14:29:56,999 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 [2022-12-13 14:29:57,007 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 16 treesize of output 18 [2022-12-13 14:29:58,952 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_6611 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6611) |c_#length|) (<= (mod .cse0 4294967296) v_ArrVal_6611)))) is different from true [2022-12-13 14:30:00,563 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_6611 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (< 4 .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6611) |c_#length|) (<= .cse0 v_ArrVal_6611)))) is different from true [2022-12-13 14:30:01,517 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:30:01,517 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 [2022-12-13 14:30:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 276 proven. 845 refuted. 0 times theorem prover too weak. 222 trivial. 208 not checked. [2022-12-13 14:30:04,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:30:07,216 WARN L837 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_l2_insert_~list#1.offset|) (forall ((|v_zalloc_or_die_calloc_model_~size#1_108| Int) (|v_zalloc_or_die_calloc_model_~nmemb#1_108| Int)) (let ((.cse0 (mod (* |v_zalloc_or_die_calloc_model_~size#1_108| |v_zalloc_or_die_calloc_model_~nmemb#1_108|) 4294967296))) (or (forall ((v_ArrVal_6614 Int)) (or (forall ((|v_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base_112| Int)) (<= (+ |c_ULTIMATE.start_l2_insert_~list#1.offset| 4) (select (store |c_#length| |v_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base_112| v_ArrVal_6614) |c_ULTIMATE.start_l2_insert_~list#1.base|))) (not (<= .cse0 v_ArrVal_6614)))) (not (< 4 .cse0)))))) is different from false [2022-12-13 14:30:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:30:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155223588] [2022-12-13 14:30:07,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:30:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372032866] [2022-12-13 14:30:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372032866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:30:07,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:30:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-12-13 14:30:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281301958] [2022-12-13 14:30:07,219 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:30:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 14:30:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:30:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 14:30:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1755, Unknown=14, NotChecked=258, Total=2162 [2022-12-13 14:30:07,221 INFO L87 Difference]: Start difference. First operand 316 states and 420 transitions. Second operand has 45 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 39 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 14:30:09,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:13,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:17,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:22,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:26,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:30,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:30:46,174 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:30:56,245 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 62 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:31:05,456 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 79 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:31:52,366 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:31:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:31:56,992 INFO L93 Difference]: Finished difference Result 401 states and 478 transitions. [2022-12-13 14:31:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 14:31:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 39 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 137 [2022-12-13 14:31:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:31:56,994 INFO L225 Difference]: With dead ends: 401 [2022-12-13 14:31:56,994 INFO L226 Difference]: Without dead ends: 401 [2022-12-13 14:31:56,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=362, Invalid=3660, Unknown=22, NotChecked=378, Total=4422 [2022-12-13 14:31:56,995 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 708 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 7222 mSolverCounterSat, 74 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 8171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 7222 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:31:56,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 1655 Invalid, 8171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 7222 Invalid, 6 Unknown, 869 Unchecked, 23.2s Time] [2022-12-13 14:31:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-12-13 14:31:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 314. [2022-12-13 14:31:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 224 states have (on average 1.6116071428571428) internal successors, (361), 290 states have internal predecessors, (361), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:31:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 418 transitions. [2022-12-13 14:31:57,001 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 418 transitions. Word has length 137 [2022-12-13 14:31:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:31:57,001 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 418 transitions. [2022-12-13 14:31:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 39 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 14:31:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 418 transitions. [2022-12-13 14:31:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-13 14:31:57,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:31:57,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:31:57,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:31:57,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:31:57,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:31:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash -894277921, now seen corresponding path program 1 times [2022-12-13 14:31:57,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:57,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868212073] [2022-12-13 14:31:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:57,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:57,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:31:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706676982] [2022-12-13 14:31:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:57,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:31:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:31:57,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:31:57,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:31:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 14:31:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:31:57,892 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:31:57,892 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 [2022-12-13 14:31:58,097 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-13 14:31:58,097 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 [2022-12-13 14:31:58,380 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-13 14:31:58,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-12-13 14:31:58,467 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7302 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_7302))) is different from true [2022-12-13 14:31:58,482 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7302 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_7302))) is different from true [2022-12-13 14:31:58,485 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7302 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_7302))) is different from true [2022-12-13 14:31:58,487 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7302 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_7302))) is different from true [2022-12-13 14:31:58,514 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 14:31:58,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-12-13 14:31:58,717 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7303 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7303))) is different from true [2022-12-13 14:31:58,909 INFO L321 Elim1Store]: treesize reduction 40, result has 68.0 percent of original size [2022-12-13 14:31:58,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 133 [2022-12-13 14:32:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 181 proven. 700 refuted. 0 times theorem prover too weak. 226 trivial. 444 not checked. [2022-12-13 14:32:03,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:32:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868212073] [2022-12-13 14:32:03,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:32:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706676982] [2022-12-13 14:32:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706676982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:32:03,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:32:03,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-12-13 14:32:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728561418] [2022-12-13 14:32:03,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 14:32:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:32:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 14:32:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=881, Unknown=5, NotChecked=320, Total=1332 [2022-12-13 14:32:03,138 INFO L87 Difference]: Start difference. First operand 314 states and 418 transitions. Second operand has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 14:32:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:32:06,050 INFO L93 Difference]: Finished difference Result 404 states and 481 transitions. [2022-12-13 14:32:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 14:32:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 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 144 [2022-12-13 14:32:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:32:06,051 INFO L225 Difference]: With dead ends: 404 [2022-12-13 14:32:06,052 INFO L226 Difference]: Without dead ends: 404 [2022-12-13 14:32:06,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=1632, Unknown=5, NotChecked=440, Total=2352 [2022-12-13 14:32:06,052 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 502 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 68 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 4417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 1495 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:32:06,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 3432 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2813 Invalid, 41 Unknown, 1495 Unchecked, 2.5s Time] [2022-12-13 14:32:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-13 14:32:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 311. [2022-12-13 14:32:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 224 states have (on average 1.5982142857142858) internal successors, (358), 287 states have internal predecessors, (358), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:32:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 415 transitions. [2022-12-13 14:32:06,058 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 415 transitions. Word has length 144 [2022-12-13 14:32:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:32:06,058 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 415 transitions. [2022-12-13 14:32:06,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 14:32:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 415 transitions. [2022-12-13 14:32:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-13 14:32:06,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:32:06,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:32:06,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:32:06,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:32:06,261 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:32:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:06,262 INFO L85 PathProgramCache]: Analyzing trace with hash -894277920, now seen corresponding path program 1 times [2022-12-13 14:32:06,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:32:06,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289151143] [2022-12-13 14:32:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:06,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:32:06,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:32:06,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061247112] [2022-12-13 14:32:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:06,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:32:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:32:06,339 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:32:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:32:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 191 conjunts are in the unsatisfiable core [2022-12-13 14:32:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:10,163 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-13 14:32:10,167 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 [2022-12-13 14:32:18,409 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:32:18,409 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 [2022-12-13 14:32:18,598 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:32:18,598 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 [2022-12-13 14:32:21,456 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:32:21,456 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 [2022-12-13 14:32:21,565 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-13 14:32:21,565 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 [2022-12-13 14:32:26,887 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:32:26,887 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 [2022-12-13 14:32:27,005 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-13 14:32:27,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-12-13 14:32:30,781 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:32:30,781 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 [2022-12-13 14:32:30,957 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 14:32:30,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-12-13 14:32:35,521 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8001 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_8001) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-13 14:32:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:32:35,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 14:32:35,764 INFO L321 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-12-13 14:32:35,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2022-12-13 14:32:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 181 proven. 484 refuted. 0 times theorem prover too weak. 446 trivial. 440 not checked. [2022-12-13 14:32:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:32:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289151143] [2022-12-13 14:32:40,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:32:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061247112] [2022-12-13 14:32:40,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061247112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:32:40,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:32:40,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-12-13 14:32:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411624653] [2022-12-13 14:32:40,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:40,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 14:32:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:32:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 14:32:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=4, NotChecked=88, Total=2162 [2022-12-13 14:32:40,487 INFO L87 Difference]: Start difference. First operand 311 states and 415 transitions. Second operand has 45 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 14:32:42,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:32:46,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:32:48,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:32:52,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:32:55,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:32:57,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:33:01,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:33:03,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:33:07,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:33:12,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:33:25,869 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 48 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:33:39,215 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 82 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:31,295 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 92 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:34:43,815 INFO L93 Difference]: Finished difference Result 402 states and 481 transitions. [2022-12-13 14:34:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 14:34:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 144 [2022-12-13 14:34:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:34:43,816 INFO L225 Difference]: With dead ends: 402 [2022-12-13 14:34:43,817 INFO L226 Difference]: Without dead ends: 402 [2022-12-13 14:34:43,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 116.3s TimeCoverageRelationStatistics Valid=642, Invalid=5356, Unknown=12, NotChecked=152, Total=6162 [2022-12-13 14:34:43,818 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 743 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 6016 mSolverCounterSat, 118 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 6565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 6016 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:34:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1061 Invalid, 6565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 6016 Invalid, 10 Unknown, 421 Unchecked, 32.6s Time] [2022-12-13 14:34:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-12-13 14:34:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 308. [2022-12-13 14:34:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 224 states have (on average 1.5848214285714286) internal successors, (355), 284 states have internal predecessors, (355), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2022-12-13 14:34:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 412 transitions. [2022-12-13 14:34:43,824 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 412 transitions. Word has length 144 [2022-12-13 14:34:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:34:43,824 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 412 transitions. [2022-12-13 14:34:43,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 14:34:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 412 transitions. [2022-12-13 14:34:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 14:34:43,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:34:43,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:34:43,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 14:34:44,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:34:44,027 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-13 14:34:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:34:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1952811697, now seen corresponding path program 1 times [2022-12-13 14:34:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:34:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239248052] [2022-12-13 14:34:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:34:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:34:44,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:34:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957861614] [2022-12-13 14:34:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:34:44,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:34:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:34:44,113 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:34:44,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_016e7f04-94b5-451e-8da7-86fb5adbb4d1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:34:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:34:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 164 conjunts are in the unsatisfiable core [2022-12-13 14:34:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:34:45,433 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 10 treesize of output 9 [2022-12-13 14:35:00,010 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 14:35:00,010 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 [2022-12-13 14:35:00,019 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 16 treesize of output 18 [2022-12-13 14:35:02,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:35:02,376 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 [2022-12-13 14:35:02,562 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-13 14:35:02,562 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 [2022-12-13 14:35:06,177 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:35:06,177 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 [2022-12-13 14:35:06,335 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-13 14:35:06,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2022-12-13 14:35:09,021 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_8696 Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8696)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-13 14:35:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:35:09,092 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 36 treesize of output 38 [2022-12-13 14:35:09,115 INFO L321 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2022-12-13 14:35:09,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 26 treesize of output 32 [2022-12-13 14:35:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 96 proven. 792 refuted. 0 times theorem prover too weak. 239 trivial. 424 not checked. [2022-12-13 14:35:10,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:35:10,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:35:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239248052] [2022-12-13 14:35:10,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:35:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957861614] [2022-12-13 14:35:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957861614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:35:10,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:35:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-12-13 14:35:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501737087] [2022-12-13 14:35:10,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:35:10,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 14:35:10,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:35:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 14:35:10,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2187, Unknown=20, NotChecked=94, Total=2450 [2022-12-13 14:35:10,997 INFO L87 Difference]: Start difference. First operand 308 states and 412 transitions. Second operand has 47 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 41 states have internal predecessors, (96), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 14:35:13,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:17,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:19,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:21,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:24,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:26,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:28,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:31,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:35,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:41,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:46,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:51,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:35:57,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:36:03,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:36:13,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:36:27,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:36:29,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]