./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/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_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/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_47222c7a-1a1e-4489-a042-97b090c50f19/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 36c3a12d89778d96e6058a4f11ff4e1483403bd2fab9b14de640491057c7f753 --- 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 18:07:27,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:07:27,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:07:27,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:07:27,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:07:27,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:07:27,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:07:27,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:07:27,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:07:27,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:07:27,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:07:27,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:07:27,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:07:27,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:07:27,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:07:27,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:07:27,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:07:27,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:07:27,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:07:27,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:07:27,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:07:27,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:07:27,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:07:27,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:07:27,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:07:27,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:07:27,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:07:27,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:07:27,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:07:27,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:07:27,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:07:27,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:07:27,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:07:27,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:07:27,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:07:27,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:07:27,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:07:27,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:07:27,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:07:27,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:07:27,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:07:27,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:07:27,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:07:27,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:07:27,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:07:27,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:07:27,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:07:27,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:07:27,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:07:27,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:07:27,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:07:27,596 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:07:27,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:07:27,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:07:27,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:07:27,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:07:27,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:07:27,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:07:27,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:07:27,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:07:27,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:07:27,599 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:07:27,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:07:27,599 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:07:27,599 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_47222c7a-1a1e-4489-a042-97b090c50f19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36c3a12d89778d96e6058a4f11ff4e1483403bd2fab9b14de640491057c7f753 [2022-12-13 18:07:27,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:07:27,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:07:27,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:07:27,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:07:27,790 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:07:27,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i [2022-12-13 18:07:30,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:07:30,581 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:07:30,582 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/sv-benchmarks/c/array-memsafety/openbsd_cstpncpy-alloca-1.i [2022-12-13 18:07:30,592 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/data/84d8468cd/39132dcf8034488494eaa56814ea8cd9/FLAG43c2fb37e [2022-12-13 18:07:30,607 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/data/84d8468cd/39132dcf8034488494eaa56814ea8cd9 [2022-12-13 18:07:30,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:07:30,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:07:30,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:07:30,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:07:30,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:07:30,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:30,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3877699b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30, skipping insertion in model container [2022-12-13 18:07:30,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:30,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:07:30,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:07:30,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:07:30,903 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:07:30,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:07:30,964 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:07:30,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30 WrapperNode [2022-12-13 18:07:30,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:07:30,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:07:30,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:07:30,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:07:30,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:30,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,002 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-12-13 18:07:31,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:07:31,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:07:31,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:07:31,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:07:31,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:07:31,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:07:31,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:07:31,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:07:31,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (1/1) ... [2022-12-13 18:07:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:07:31,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:31,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:07:31,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:07:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:07:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:07:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 18:07:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:07:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 18:07:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:07:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:07:31,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:07:31,182 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:07:31,183 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:07:31,402 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:07:31,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:07:31,407 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:07:31,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:07:31 BoogieIcfgContainer [2022-12-13 18:07:31,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:07:31,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:07:31,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:07:31,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:07:31,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:07:30" (1/3) ... [2022-12-13 18:07:31,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de96ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:07:31, skipping insertion in model container [2022-12-13 18:07:31,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:07:30" (2/3) ... [2022-12-13 18:07:31,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de96ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:07:31, skipping insertion in model container [2022-12-13 18:07:31,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:07:31" (3/3) ... [2022-12-13 18:07:31,415 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca-1.i [2022-12-13 18:07:31,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:07:31,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-12-13 18:07:31,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:07:31,466 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;@7fb305bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:07:31,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 18:07:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:07:31,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:31,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:31,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:31,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2022-12-13 18:07:31,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:31,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941762970] [2022-12-13 18:07:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:31,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:31,655 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 18:07:31,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941762970] [2022-12-13 18:07:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941762970] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:31,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:31,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:07:31,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150487273] [2022-12-13 18:07:31,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:31,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:31,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:31,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:31,685 INFO L87 Difference]: Start difference. First operand has 59 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:31,742 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-12-13 18:07:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:07:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:31,749 INFO L225 Difference]: With dead ends: 57 [2022-12-13 18:07:31,750 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 18:07:31,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:31,753 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:31,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 44 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 18:07:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-13 18:07:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-12-13 18:07:31,777 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 7 [2022-12-13 18:07:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:31,777 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-12-13 18:07:31,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-12-13 18:07:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:07:31,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:31,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:31,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:07:31,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2022-12-13 18:07:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618920677] [2022-12-13 18:07:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:31,939 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 18:07:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618920677] [2022-12-13 18:07:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618920677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:31,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:31,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:07:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128594846] [2022-12-13 18:07:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:31,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:07:31,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:31,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:07:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:07:31,943 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,022 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2022-12-13 18:07:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:07:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:07:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,024 INFO L225 Difference]: With dead ends: 106 [2022-12-13 18:07:32,024 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 18:07:32,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:07:32,026 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 136 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 18:07:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2022-12-13 18:07:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-12-13 18:07:32,033 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 7 [2022-12-13 18:07:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,034 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-12-13 18:07:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-12-13 18:07:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:07:32,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:07:32,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-12-13 18:07:32,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460972559] [2022-12-13 18:07:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:32,089 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 18:07:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:32,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460972559] [2022-12-13 18:07:32,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460972559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:32,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:32,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:07:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634650513] [2022-12-13 18:07:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:07:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:07:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:07:32,091 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,112 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2022-12-13 18:07:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:07:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:07:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,113 INFO L225 Difference]: With dead ends: 102 [2022-12-13 18:07:32,113 INFO L226 Difference]: Without dead ends: 102 [2022-12-13 18:07:32,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:07:32,115 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 97 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 113 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-13 18:07:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2022-12-13 18:07:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.736842105263158) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:07:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-13 18:07:32,121 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 7 [2022-12-13 18:07:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-13 18:07:32,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-13 18:07:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:07:32,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:07:32,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876086, now seen corresponding path program 1 times [2022-12-13 18:07:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532577132] [2022-12-13 18:07:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:32,292 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 18:07:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532577132] [2022-12-13 18:07:32,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532577132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:32,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:32,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:07:32,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775809819] [2022-12-13 18:07:32,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:32,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:07:32,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:07:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:07:32,295 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,406 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-12-13 18:07:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:07:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:07:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,407 INFO L225 Difference]: With dead ends: 66 [2022-12-13 18:07:32,407 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 18:07:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:07:32,409 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 69 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 113 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 18:07:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-12-13 18:07:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-12-13 18:07:32,412 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 7 [2022-12-13 18:07:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,412 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-12-13 18:07:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-12-13 18:07:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:07:32,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:07:32,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-12-13 18:07:32,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826658597] [2022-12-13 18:07:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:32,498 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 18:07:32,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826658597] [2022-12-13 18:07:32,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826658597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:32,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:32,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:07:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159404805] [2022-12-13 18:07:32,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:32,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:07:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:07:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:07:32,500 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,590 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-12-13 18:07:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:07:32,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:07:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,591 INFO L225 Difference]: With dead ends: 64 [2022-12-13 18:07:32,591 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 18:07:32,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:07:32,592 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 69 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 113 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 18:07:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-12-13 18:07:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.725) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:07:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-12-13 18:07:32,595 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 7 [2022-12-13 18:07:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,596 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-12-13 18:07:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-12-13 18:07:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 18:07:32,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:07:32,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -533877068, now seen corresponding path program 1 times [2022-12-13 18:07:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165878817] [2022-12-13 18:07:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:32,628 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 18:07:32,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165878817] [2022-12-13 18:07:32,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165878817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:32,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:32,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:07:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213105970] [2022-12-13 18:07:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:32,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:32,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:32,631 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,666 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-12-13 18:07:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 18:07:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,667 INFO L225 Difference]: With dead ends: 55 [2022-12-13 18:07:32,667 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 18:07:32,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:32,669 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 18:07:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-13 18:07:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.575) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-12-13 18:07:32,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 9 [2022-12-13 18:07:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,673 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-12-13 18:07:32,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-12-13 18:07:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 18:07:32,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:07:32,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -533877067, now seen corresponding path program 1 times [2022-12-13 18:07:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14333978] [2022-12-13 18:07:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:32,736 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 18:07:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14333978] [2022-12-13 18:07:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14333978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:32,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:32,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:07:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15299942] [2022-12-13 18:07:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:32,738 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:32,767 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-13 18:07:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:07:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 18:07:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:32,768 INFO L225 Difference]: With dead ends: 49 [2022-12-13 18:07:32,768 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 18:07:32,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:32,769 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:32,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 18:07:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-13 18:07:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 18:07:32,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 9 [2022-12-13 18:07:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:32,773 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 18:07:32,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 18:07:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 18:07:32,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:32,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:32,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:07:32,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025223, now seen corresponding path program 1 times [2022-12-13 18:07:32,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:32,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147202241] [2022-12-13 18:07:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:32,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:33,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147202241] [2022-12-13 18:07:33,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147202241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:33,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081935825] [2022-12-13 18:07:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:33,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:33,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:07:33,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:07:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:07:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:33,153 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:07:33,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 18:07:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:07:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:33,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081935825] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:33,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:07:33,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-12-13 18:07:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127465470] [2022-12-13 18:07:33,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:33,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:07:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:07:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:07:33,424 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:33,546 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-12-13 18:07:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 18:07:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:33,547 INFO L225 Difference]: With dead ends: 48 [2022-12-13 18:07:33,547 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 18:07:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:07:33,548 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:33,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 18:07:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-13 18:07:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:07:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-13 18:07:33,551 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2022-12-13 18:07:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:33,551 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-13 18:07:33,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-13 18:07:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 18:07:33,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:33,552 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:33,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:07:33,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:33,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-12-13 18:07:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722994045] [2022-12-13 18:07:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:33,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:34,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722994045] [2022-12-13 18:07:34,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722994045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382201848] [2022-12-13 18:07:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:34,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:34,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:34,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:07:34,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:07:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:07:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:34,138 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:07:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 18:07:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:34,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:07:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:34,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382201848] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:07:34,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:07:34,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 18:07:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614056212] [2022-12-13 18:07:34,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:07:34,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:07:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:07:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:07:34,460 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:07:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:34,703 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-12-13 18:07:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:07:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 18:07:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:34,705 INFO L225 Difference]: With dead ends: 83 [2022-12-13 18:07:34,705 INFO L226 Difference]: Without dead ends: 83 [2022-12-13 18:07:34,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-12-13 18:07:34,706 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 306 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:34,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 146 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-13 18:07:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2022-12-13 18:07:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-12-13 18:07:34,710 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 11 [2022-12-13 18:07:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:34,710 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-12-13 18:07:34,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:07:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-12-13 18:07:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:07:34,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:34,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:34,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:07:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:34,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash 229648597, now seen corresponding path program 1 times [2022-12-13 18:07:34,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:34,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618768919] [2022-12-13 18:07:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:34,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:35,083 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 18:07:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618768919] [2022-12-13 18:07:35,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618768919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:35,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:35,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:07:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870634066] [2022-12-13 18:07:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:07:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:07:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:07:35,085 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:35,121 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2022-12-13 18:07:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:07:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 18:07:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:35,122 INFO L225 Difference]: With dead ends: 94 [2022-12-13 18:07:35,122 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 18:07:35,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:35,123 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 108 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:35,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 183 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 18:07:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2022-12-13 18:07:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:07:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-12-13 18:07:35,127 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 15 [2022-12-13 18:07:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:35,127 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-12-13 18:07:35,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-12-13 18:07:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:07:35,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:35,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:35,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:07:35,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 487814035, now seen corresponding path program 1 times [2022-12-13 18:07:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:35,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187428902] [2022-12-13 18:07:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:35,191 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 18:07:35,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187428902] [2022-12-13 18:07:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187428902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:35,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:35,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:07:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889252039] [2022-12-13 18:07:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:35,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:07:35,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:07:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:07:35,193 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:35,225 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-12-13 18:07:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:35,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 18:07:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:35,226 INFO L225 Difference]: With dead ends: 67 [2022-12-13 18:07:35,226 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 18:07:35,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:07:35,227 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 158 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 83 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 18:07:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2022-12-13 18:07:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:07:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-13 18:07:35,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 15 [2022-12-13 18:07:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:35,230 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-13 18:07:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-13 18:07:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 18:07:35,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:35,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:07:35,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -994678340, now seen corresponding path program 1 times [2022-12-13 18:07:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745301176] [2022-12-13 18:07:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:35,385 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 18:07:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745301176] [2022-12-13 18:07:35,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745301176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:35,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:35,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:07:35,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120650234] [2022-12-13 18:07:35,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:35,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:07:35,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:07:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:07:35,386 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:35,470 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-13 18:07:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:07:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 18:07:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:35,471 INFO L225 Difference]: With dead ends: 43 [2022-12-13 18:07:35,471 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 18:07:35,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:07:35,472 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:35,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 73 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 18:07:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 18:07:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 18:07:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-13 18:07:35,474 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2022-12-13 18:07:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:35,474 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-13 18:07:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-13 18:07:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 18:07:35,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:35,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:07:35,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -994678339, now seen corresponding path program 1 times [2022-12-13 18:07:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131749950] [2022-12-13 18:07:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:35,694 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 18:07:35,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131749950] [2022-12-13 18:07:35,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131749950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:35,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:35,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:07:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267994046] [2022-12-13 18:07:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:07:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:07:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:07:35,697 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:35,871 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-12-13 18:07:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:07:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 18:07:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:35,872 INFO L225 Difference]: With dead ends: 52 [2022-12-13 18:07:35,872 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 18:07:35,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:07:35,873 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 203 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:35,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 83 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 18:07:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-12-13 18:07:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-12-13 18:07:35,876 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 18 [2022-12-13 18:07:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:35,876 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-12-13 18:07:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-12-13 18:07:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:07:35,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:35,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:35,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:07:35,877 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash -770257435, now seen corresponding path program 1 times [2022-12-13 18:07:35,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:35,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657694426] [2022-12-13 18:07:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:35,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:36,313 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 18:07:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657694426] [2022-12-13 18:07:36,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657694426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:36,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:36,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:07:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790025522] [2022-12-13 18:07:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:07:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:07:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:07:36,315 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:36,549 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-12-13 18:07:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:07:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-12-13 18:07:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:36,550 INFO L225 Difference]: With dead ends: 88 [2022-12-13 18:07:36,550 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 18:07:36,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:07:36,551 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:36,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 223 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 18:07:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2022-12-13 18:07:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:07:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-12-13 18:07:36,554 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 19 [2022-12-13 18:07:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:36,555 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-12-13 18:07:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-12-13 18:07:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:07:36,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:36,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 18:07:36,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash -770257436, now seen corresponding path program 1 times [2022-12-13 18:07:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:36,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492124340] [2022-12-13 18:07:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:36,774 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 18:07:36,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492124340] [2022-12-13 18:07:36,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492124340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:36,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:36,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 18:07:36,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042420516] [2022-12-13 18:07:36,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:36,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:07:36,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:07:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:07:36,776 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:36,994 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-13 18:07:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:07:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-12-13 18:07:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:36,995 INFO L225 Difference]: With dead ends: 64 [2022-12-13 18:07:36,995 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 18:07:36,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:07:36,996 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:36,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 134 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 18:07:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-13 18:07:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-12-13 18:07:36,999 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 19 [2022-12-13 18:07:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:36,999 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-12-13 18:07:36,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-12-13 18:07:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:07:37,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:37,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:37,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:07:37,001 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:37,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1791325789, now seen corresponding path program 1 times [2022-12-13 18:07:37,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262872061] [2022-12-13 18:07:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:37,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:37,314 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 18:07:37,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262872061] [2022-12-13 18:07:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262872061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:37,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:37,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 18:07:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93231181] [2022-12-13 18:07:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:07:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:07:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:07:37,316 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:37,501 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-12-13 18:07:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:07:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-12-13 18:07:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:37,501 INFO L225 Difference]: With dead ends: 66 [2022-12-13 18:07:37,501 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 18:07:37,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:07:37,502 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:37,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 128 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 18:07:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2022-12-13 18:07:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-12-13 18:07:37,503 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 19 [2022-12-13 18:07:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:37,503 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-12-13 18:07:37,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:07:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-12-13 18:07:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:37,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:37,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 18:07:37,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1682807689, now seen corresponding path program 1 times [2022-12-13 18:07:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561390418] [2022-12-13 18:07:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:37,554 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 18:07:37,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561390418] [2022-12-13 18:07:37,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561390418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:37,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:37,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:07:37,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915454795] [2022-12-13 18:07:37,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:07:37,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:07:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:07:37,556 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:37,602 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-12-13 18:07:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:37,603 INFO L225 Difference]: With dead ends: 44 [2022-12-13 18:07:37,603 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 18:07:37,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:37,604 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:37,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 95 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 18:07:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-13 18:07:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:07:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-13 18:07:37,606 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2022-12-13 18:07:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:37,606 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-13 18:07:37,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-13 18:07:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:37,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:37,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 18:07:37,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1682807690, now seen corresponding path program 1 times [2022-12-13 18:07:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:37,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778068408] [2022-12-13 18:07:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:37,724 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 18:07:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778068408] [2022-12-13 18:07:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778068408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:37,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:37,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:07:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885060065] [2022-12-13 18:07:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:07:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:07:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:07:37,725 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:37,780 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-12-13 18:07:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:37,781 INFO L225 Difference]: With dead ends: 88 [2022-12-13 18:07:37,781 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 18:07:37,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:07:37,782 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:37,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 18:07:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-12-13 18:07:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-12-13 18:07:37,785 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 24 [2022-12-13 18:07:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:37,785 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-12-13 18:07:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-12-13 18:07:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:37,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:37,786 INFO L195 NwaCegarLoop]: trace histogram [2, 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 18:07:37,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 18:07:37,786 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1703829822, now seen corresponding path program 1 times [2022-12-13 18:07:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074492611] [2022-12-13 18:07:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:37,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:37,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074492611] [2022-12-13 18:07:37,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074492611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:37,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:37,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:07:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093050916] [2022-12-13 18:07:37,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:07:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:07:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:07:37,876 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:37,929 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-12-13 18:07:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:37,930 INFO L225 Difference]: With dead ends: 75 [2022-12-13 18:07:37,930 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 18:07:37,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:07:37,931 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:37,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 182 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 18:07:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-12-13 18:07:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-12-13 18:07:37,932 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 24 [2022-12-13 18:07:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:37,933 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-12-13 18:07:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-12-13 18:07:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:37,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:37,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 18:07:37,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2105509516, now seen corresponding path program 1 times [2022-12-13 18:07:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802179931] [2022-12-13 18:07:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:38,641 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 18:07:38,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802179931] [2022-12-13 18:07:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802179931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:38,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:38,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 18:07:38,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330061401] [2022-12-13 18:07:38,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:38,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:07:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:38,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:07:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:07:38,643 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:39,509 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-12-13 18:07:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:07:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:39,511 INFO L225 Difference]: With dead ends: 77 [2022-12-13 18:07:39,511 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 18:07:39,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:07:39,512 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:39,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 165 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:07:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 18:07:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-12-13 18:07:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-12-13 18:07:39,514 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 24 [2022-12-13 18:07:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:39,514 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-12-13 18:07:39,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-12-13 18:07:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:39,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:39,515 INFO L195 NwaCegarLoop]: trace histogram [2, 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 18:07:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 18:07:39,515 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2126531648, now seen corresponding path program 1 times [2022-12-13 18:07:39,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984358137] [2022-12-13 18:07:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:39,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:39,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984358137] [2022-12-13 18:07:39,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984358137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:39,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:39,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:07:39,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970609867] [2022-12-13 18:07:39,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:39,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:07:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:07:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:07:39,722 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:39,905 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2022-12-13 18:07:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:07:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:39,906 INFO L225 Difference]: With dead ends: 120 [2022-12-13 18:07:39,906 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 18:07:39,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:07:39,907 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:39,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 18:07:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2022-12-13 18:07:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 102 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:07:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2022-12-13 18:07:39,911 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 24 [2022-12-13 18:07:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:39,911 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2022-12-13 18:07:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2022-12-13 18:07:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:07:39,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:39,912 INFO L195 NwaCegarLoop]: trace histogram [2, 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 18:07:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 18:07:39,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1949580930, now seen corresponding path program 1 times [2022-12-13 18:07:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:39,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383264024] [2022-12-13 18:07:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:39,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:40,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:40,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383264024] [2022-12-13 18:07:40,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383264024] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:40,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:40,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 18:07:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986173798] [2022-12-13 18:07:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:40,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:07:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:07:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:07:40,139 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:40,357 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2022-12-13 18:07:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:07:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-12-13 18:07:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:40,358 INFO L225 Difference]: With dead ends: 156 [2022-12-13 18:07:40,358 INFO L226 Difference]: Without dead ends: 156 [2022-12-13 18:07:40,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:07:40,359 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 120 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:40,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 188 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:07:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-13 18:07:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 105. [2022-12-13 18:07:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 104 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-12-13 18:07:40,361 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 24 [2022-12-13 18:07:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:40,361 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-12-13 18:07:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:07:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-12-13 18:07:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 18:07:40,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:40,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 18:07:40,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1664467980, now seen corresponding path program 1 times [2022-12-13 18:07:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333062784] [2022-12-13 18:07:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:40,788 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 18:07:40,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333062784] [2022-12-13 18:07:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333062784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:40,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:07:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399465785] [2022-12-13 18:07:40,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:07:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:07:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:40,790 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:07:40,838 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-12-13 18:07:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:07:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 18:07:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:07:40,839 INFO L225 Difference]: With dead ends: 104 [2022-12-13 18:07:40,839 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 18:07:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:07:40,840 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:07:40,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:07:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 18:07:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 18:07:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:07:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-12-13 18:07:40,843 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 27 [2022-12-13 18:07:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:07:40,843 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-12-13 18:07:40,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-12-13 18:07:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:07:40,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:07:40,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 18:07:40,844 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:07:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 235701316, now seen corresponding path program 1 times [2022-12-13 18:07:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:07:40,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422073360] [2022-12-13 18:07:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:07:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:41,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:07:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422073360] [2022-12-13 18:07:41,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422073360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:07:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133387672] [2022-12-13 18:07:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:41,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:07:41,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:07:41,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:07:41,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:07:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 18:07:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:07:42,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 18:07:42,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:07:42,092 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:07:42,093 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 18 treesize of output 24 [2022-12-13 18:07:42,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:07:42,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:07:42,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-13 18:07:42,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:07:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:42,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:07:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:07:45,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133387672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:07:45,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:07:45,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-12-13 18:07:45,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855230461] [2022-12-13 18:07:45,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:07:45,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 18:07:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:07:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 18:07:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 18:07:45,854 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:08:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:08:34,405 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-12-13 18:08:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:08:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 18:08:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:08:34,406 INFO L225 Difference]: With dead ends: 84 [2022-12-13 18:08:34,406 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:08:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=450, Invalid=3710, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 18:08:34,407 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:08:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 327 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:08:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:08:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-12-13 18:08:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.162162162162162) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:08:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-12-13 18:08:34,409 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 28 [2022-12-13 18:08:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:08:34,409 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-12-13 18:08:34,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:08:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-12-13 18:08:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:08:34,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:08:34,410 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:34,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:08:34,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 18:08:34,611 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:08:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1959516773, now seen corresponding path program 1 times [2022-12-13 18:08:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:34,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295224515] [2022-12-13 18:08:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295224515] [2022-12-13 18:08:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295224515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:08:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689288465] [2022-12-13 18:08:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:08:34,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:08:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:08:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:08:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:35,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:08:35,171 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 14 treesize of output 16 [2022-12-13 18:08:35,178 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:08:35,178 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 18:08:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:35,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:08:35,535 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 27 treesize of output 23 [2022-12-13 18:08:35,606 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:08:35,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:08:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:35,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689288465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:08:35,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:08:35,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-12-13 18:08:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011391834] [2022-12-13 18:08:35,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:08:35,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:08:35,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:08:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:08:35,633 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:08:36,271 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-12-13 18:08:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:08:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 18:08:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:08:36,272 INFO L225 Difference]: With dead ends: 107 [2022-12-13 18:08:36,272 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:08:36,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 18:08:36,272 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 306 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:08:36,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 322 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:08:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:08:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-12-13 18:08:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2022-12-13 18:08:36,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 28 [2022-12-13 18:08:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:08:36,275 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2022-12-13 18:08:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2022-12-13 18:08:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:08:36,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:08:36,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:36,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 18:08:36,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:36,478 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:08:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash -615477817, now seen corresponding path program 1 times [2022-12-13 18:08:36,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:36,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831344918] [2022-12-13 18:08:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:08:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:37,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831344918] [2022-12-13 18:08:37,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831344918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:08:37,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823709392] [2022-12-13 18:08:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:37,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:08:37,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:08:37,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:08:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 18:08:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:37,484 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:08:37,484 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 19 treesize of output 18 [2022-12-13 18:08:37,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-13 18:08:37,581 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:08:37,581 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:08:37,596 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:08:37,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:08:37,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:08:37,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:08:37,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-12-13 18:08:37,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:08:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:08:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:08:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:08:39,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823709392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:08:39,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:08:39,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2022-12-13 18:08:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581143729] [2022-12-13 18:08:39,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:08:39,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 18:08:39,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 18:08:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 18:08:39,195 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 41 states, 40 states have (on average 2.05) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:08:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:08:43,461 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-12-13 18:08:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 18:08:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 18:08:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:08:43,462 INFO L225 Difference]: With dead ends: 77 [2022-12-13 18:08:43,462 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 18:08:43,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=460, Invalid=2962, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 18:08:43,464 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 292 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:08:43,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 310 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:08:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 18:08:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-13 18:08:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2022-12-13 18:08:43,467 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 29 [2022-12-13 18:08:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:08:43,467 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2022-12-13 18:08:43,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:08:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2022-12-13 18:08:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 18:08:43,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:08:43,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:43,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:08:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:08:43,669 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:08:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1510311704, now seen corresponding path program 1 times [2022-12-13 18:08:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725158464] [2022-12-13 18:08:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:08:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:44,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725158464] [2022-12-13 18:08:44,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725158464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:08:44,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377766375] [2022-12-13 18:08:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:44,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:08:44,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:08:44,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:08:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 18:08:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:44,951 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:08:44,951 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 19 treesize of output 18 [2022-12-13 18:08:44,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 18:08:45,126 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:08:45,126 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 14 treesize of output 20 [2022-12-13 18:08:45,141 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:08:45,141 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 18:08:45,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:08:45,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:08:45,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 18:08:45,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:08:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:46,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:08:47,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:08:47,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:08:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:47,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377766375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:08:47,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:08:47,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 16] total 51 [2022-12-13 18:08:47,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120231777] [2022-12-13 18:08:47,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:08:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 18:08:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 18:08:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2450, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 18:08:47,453 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:08:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:08:54,110 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2022-12-13 18:08:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 18:08:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 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 34 [2022-12-13 18:08:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:08:54,111 INFO L225 Difference]: With dead ends: 107 [2022-12-13 18:08:54,111 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:08:54,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1128, Invalid=6704, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 18:08:54,113 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 469 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:08:54,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 418 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 18:08:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:08:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2022-12-13 18:08:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 18:08:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-12-13 18:08:54,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 34 [2022-12-13 18:08:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:08:54,114 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-12-13 18:08:54,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:08:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-12-13 18:08:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 18:08:54,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:08:54,115 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:54,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:08:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 18:08:54,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:08:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1489289572, now seen corresponding path program 2 times [2022-12-13 18:08:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:08:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096765298] [2022-12-13 18:08:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:08:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:54,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:08:54,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096765298] [2022-12-13 18:08:54,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096765298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:08:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954072274] [2022-12-13 18:08:54,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:08:54,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:08:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:08:54,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:08:54,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:08:54,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:08:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:08:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 18:08:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:54,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:08:55,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:08:55,067 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:08:55,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:08:55,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:08:55,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:08:55,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:08:55,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:08:55,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:08:55,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:08:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:08:55,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:08:55,250 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_968) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:08:55,256 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array Int Int)) (v_ArrVal_967 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_967) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_968) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:08:59,490 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array Int Int)) (v_ArrVal_967 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_967) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_968) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 1)) 0)) is different from false [2022-12-13 18:08:59,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:08:59,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:08:59,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:08:59,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:08:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:08:59,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:08:59,750 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:08:59,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:08:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 18:08:59,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954072274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:08:59,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:08:59,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 38 [2022-12-13 18:08:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524785321] [2022-12-13 18:08:59,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:08:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 18:08:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:08:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 18:08:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1044, Unknown=34, NotChecked=204, Total=1406 [2022-12-13 18:08:59,880 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:00,917 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2022-12-13 18:09:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 18:09:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-13 18:09:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:00,919 INFO L225 Difference]: With dead ends: 149 [2022-12-13 18:09:00,919 INFO L226 Difference]: Without dead ends: 149 [2022-12-13 18:09:00,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=385, Invalid=2043, Unknown=34, NotChecked=294, Total=2756 [2022-12-13 18:09:00,920 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 177 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:00,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 716 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 653 Invalid, 2 Unknown, 186 Unchecked, 0.4s Time] [2022-12-13 18:09:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-13 18:09:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2022-12-13 18:09:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 110 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-12-13 18:09:00,922 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 34 [2022-12-13 18:09:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:00,922 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-12-13 18:09:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-12-13 18:09:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 18:09:00,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:00,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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 18:09:00,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:09:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:09:01,125 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:01,126 INFO L85 PathProgramCache]: Analyzing trace with hash -412898380, now seen corresponding path program 2 times [2022-12-13 18:09:01,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:01,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092250654] [2022-12-13 18:09:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:01,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092250654] [2022-12-13 18:09:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092250654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899041382] [2022-12-13 18:09:02,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:09:02,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:02,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:02,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:09:02,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:09:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-13 18:09:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:02,278 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:09:02,280 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 19 treesize of output 18 [2022-12-13 18:09:02,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 18:09:02,378 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:09:02,379 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:09:02,396 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:09:02,397 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 18:09:02,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:02,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:02,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2022-12-13 18:09:02,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:09:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:03,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:04,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:09:04,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:09:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:04,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899041382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:04,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:04,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 18] total 56 [2022-12-13 18:09:04,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432576145] [2022-12-13 18:09:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:04,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 18:09:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 18:09:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 18:09:04,581 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 57 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:14,445 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2022-12-13 18:09:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 18:09:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 57 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 18:09:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:14,446 INFO L225 Difference]: With dead ends: 178 [2022-12-13 18:09:14,446 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 18:09:14,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 18:09:14,449 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 874 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:14,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 533 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 18:09:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 18:09:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2022-12-13 18:09:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 149 states have (on average 1.167785234899329) internal successors, (174), 151 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:09:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2022-12-13 18:09:14,451 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 36 [2022-12-13 18:09:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:14,451 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2022-12-13 18:09:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 57 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2022-12-13 18:09:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 18:09:14,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:14,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:09:14,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:09:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 18:09:14,655 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1201741191, now seen corresponding path program 3 times [2022-12-13 18:09:14,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:14,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172955259] [2022-12-13 18:09:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:14,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172955259] [2022-12-13 18:09:14,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172955259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823828946] [2022-12-13 18:09:14,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:09:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:14,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:14,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:09:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:09:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 18:09:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:15,216 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:09:15,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:09:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:09:15,275 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 14 treesize of output 16 [2022-12-13 18:09:15,279 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:09:15,280 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 18:09:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:15,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:15,634 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:09:15,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:09:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823828946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:15,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:15,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-12-13 18:09:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974475548] [2022-12-13 18:09:15,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 18:09:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 18:09:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 18:09:15,824 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:16,750 INFO L93 Difference]: Finished difference Result 288 states and 308 transitions. [2022-12-13 18:09:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:09:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-13 18:09:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:16,752 INFO L225 Difference]: With dead ends: 288 [2022-12-13 18:09:16,752 INFO L226 Difference]: Without dead ends: 288 [2022-12-13 18:09:16,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1691, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 18:09:16,754 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 587 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:16,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 573 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:09:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-13 18:09:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 152. [2022-12-13 18:09:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 151 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 18:09:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2022-12-13 18:09:16,757 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 38 [2022-12-13 18:09:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:16,758 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2022-12-13 18:09:16,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2022-12-13 18:09:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 18:09:16,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:16,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:09:16,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:09:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:16,960 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1400728745, now seen corresponding path program 2 times [2022-12-13 18:09:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862970247] [2022-12-13 18:09:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:09:17,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862970247] [2022-12-13 18:09:17,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862970247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332867294] [2022-12-13 18:09:17,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:09:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:17,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:17,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:09:17,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:09:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 18:09:17,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:17,830 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-12-13 18:09:17,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 18:09:17,841 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:09:17,841 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 19 treesize of output 18 [2022-12-13 18:09:17,968 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:09:17,968 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 14 treesize of output 20 [2022-12-13 18:09:17,986 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:09:17,986 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 18:09:18,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:18,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:18,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 18:09:18,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:09:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:09:18,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:09:19,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332867294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:19,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:19,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2022-12-13 18:09:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414827412] [2022-12-13 18:09:19,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:19,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 18:09:19,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 18:09:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2084, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 18:09:19,492 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:09:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:22,637 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2022-12-13 18:09:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 18:09:22,637 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 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 39 [2022-12-13 18:09:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:22,638 INFO L225 Difference]: With dead ends: 204 [2022-12-13 18:09:22,638 INFO L226 Difference]: Without dead ends: 204 [2022-12-13 18:09:22,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=838, Invalid=5482, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 18:09:22,639 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:22,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 373 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:09:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-13 18:09:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2022-12-13 18:09:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 150 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 18:09:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2022-12-13 18:09:22,642 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 39 [2022-12-13 18:09:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:22,642 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2022-12-13 18:09:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:09:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2022-12-13 18:09:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 18:09:22,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:22,643 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:09:22,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:09:22,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:22,845 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1072669446, now seen corresponding path program 4 times [2022-12-13 18:09:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:22,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697001026] [2022-12-13 18:09:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:23,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697001026] [2022-12-13 18:09:23,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697001026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761330473] [2022-12-13 18:09:23,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:09:23,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:23,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:23,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:09:23,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:09:23,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 18:09:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:23,841 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:09:23,841 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 19 treesize of output 18 [2022-12-13 18:09:24,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:09:24,082 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:09:24,082 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 18:09:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:24,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:09:24,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 24 treesize of output 12 [2022-12-13 18:09:24,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 19 [2022-12-13 18:09:24,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:09:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:09:24,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:09:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:24,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:24,635 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1418) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:09:28,771 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1418) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:09:35,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:09:35,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:09:35,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:09:35,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2022-12-13 18:09:35,277 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 54 treesize of output 46 [2022-12-13 18:09:35,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 18:09:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:09:35,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761330473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:35,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:35,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 51 [2022-12-13 18:09:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940056348] [2022-12-13 18:09:35,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 18:09:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:35,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 18:09:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2094, Unknown=114, NotChecked=190, Total=2550 [2022-12-13 18:09:35,741 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 18:09:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:37,939 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2022-12-13 18:09:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 18:09:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-13 18:09:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:37,940 INFO L225 Difference]: With dead ends: 298 [2022-12-13 18:09:37,940 INFO L226 Difference]: Without dead ends: 298 [2022-12-13 18:09:37,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=445, Invalid=4139, Unknown=116, NotChecked=270, Total=4970 [2022-12-13 18:09:37,941 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 332 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:37,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 977 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1269 Invalid, 0 Unknown, 201 Unchecked, 0.8s Time] [2022-12-13 18:09:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-13 18:09:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 181. [2022-12-13 18:09:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 180 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 18:09:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 201 transitions. [2022-12-13 18:09:37,944 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 201 transitions. Word has length 44 [2022-12-13 18:09:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:37,944 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 201 transitions. [2022-12-13 18:09:37,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 18:09:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 201 transitions. [2022-12-13 18:09:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 18:09:37,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:37,945 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:09:37,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:09:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:38,147 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 682791063, now seen corresponding path program 5 times [2022-12-13 18:09:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171530544] [2022-12-13 18:09:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:38,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:38,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171530544] [2022-12-13 18:09:38,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171530544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:38,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382548089] [2022-12-13 18:09:38,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:09:38,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:38,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:38,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:09:39,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:09:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:39,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 18:09:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:39,211 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:09:39,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:09:39,222 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:09:39,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:09:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:09:39,355 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 14 treesize of output 16 [2022-12-13 18:09:39,360 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:09:39,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:09:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:39,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:45,732 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:09:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:48,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382548089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:48,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:48,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 36 [2022-12-13 18:09:48,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115677747] [2022-12-13 18:09:48,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:48,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 18:09:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 18:09:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 18:09:48,146 INFO L87 Difference]: Start difference. First operand 181 states and 201 transitions. Second operand has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:09:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:09:49,239 INFO L93 Difference]: Finished difference Result 375 states and 394 transitions. [2022-12-13 18:09:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:09:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-13 18:09:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:09:49,240 INFO L225 Difference]: With dead ends: 375 [2022-12-13 18:09:49,240 INFO L226 Difference]: Without dead ends: 375 [2022-12-13 18:09:49,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=531, Invalid=2225, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 18:09:49,240 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 544 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:09:49,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 832 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:09:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-13 18:09:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 181. [2022-12-13 18:09:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.1173184357541899) internal successors, (200), 180 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:09:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2022-12-13 18:09:49,244 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 48 [2022-12-13 18:09:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:09:49,244 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2022-12-13 18:09:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:09:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2022-12-13 18:09:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 18:09:49,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:09:49,244 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:09:49,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:09:49,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 18:09:49,446 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:09:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 358907032, now seen corresponding path program 6 times [2022-12-13 18:09:49,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:09:49,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134556841] [2022-12-13 18:09:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:09:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:09:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:09:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:09:50,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134556841] [2022-12-13 18:09:50,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134556841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:09:50,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626005956] [2022-12-13 18:09:50,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:09:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:09:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:09:50,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:09:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:09:50,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 18:09:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-13 18:09:50,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:50,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:09:50,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:09:50,891 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:09:50,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:09:50,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:50,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:09:50,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:09:51,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:09:51,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:09:51,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:09:51,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:09:51,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:09:51,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:09:52,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:09:52,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:09:52,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-13 18:09:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:52,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:52,066 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-13 18:09:52,074 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:09:52,086 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int)) (v_ArrVal_1690 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_1690) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:09:52,095 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:09:56,412 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:09:56,779 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 3)) 0)) is different from false [2022-12-13 18:09:56,968 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_1688) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_1691) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 3)) 0)) is different from false [2022-12-13 18:09:59,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:09:59,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:09:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:09:59,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:09:59,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:09:59,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:09:59,242 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:09:59,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:09:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 27 not checked. [2022-12-13 18:09:59,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626005956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:59,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:09:59,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 65 [2022-12-13 18:09:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250476833] [2022-12-13 18:09:59,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:59,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 18:09:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:09:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 18:09:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3067, Unknown=69, NotChecked=826, Total=4160 [2022-12-13 18:09:59,577 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:10:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:10:04,078 INFO L93 Difference]: Finished difference Result 374 states and 397 transitions. [2022-12-13 18:10:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 18:10:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 54 [2022-12-13 18:10:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:10:04,080 INFO L225 Difference]: With dead ends: 374 [2022-12-13 18:10:04,080 INFO L226 Difference]: Without dead ends: 374 [2022-12-13 18:10:04,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=553, Invalid=6209, Unknown=72, NotChecked=1176, Total=8010 [2022-12-13 18:10:04,081 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 426 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 24 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 903 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:10:04,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1653 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2083 Invalid, 24 Unknown, 903 Unchecked, 1.5s Time] [2022-12-13 18:10:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-13 18:10:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 217. [2022-12-13 18:10:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 216 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 18:10:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 240 transitions. [2022-12-13 18:10:04,084 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 240 transitions. Word has length 54 [2022-12-13 18:10:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:10:04,084 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 240 transitions. [2022-12-13 18:10:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:10:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 240 transitions. [2022-12-13 18:10:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 18:10:04,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:10:04,085 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 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 18:10:04,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:10:04,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 18:10:04,285 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:10:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:10:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1742365772, now seen corresponding path program 3 times [2022-12-13 18:10:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:10:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380768967] [2022-12-13 18:10:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:10:04,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:10:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:10:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:05,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:10:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380768967] [2022-12-13 18:10:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380768967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:10:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102331977] [2022-12-13 18:10:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:10:05,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:10:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:10:05,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:10:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:10:07,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 18:10:07,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:10:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-13 18:10:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:10:07,604 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:10:07,605 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 19 treesize of output 18 [2022-12-13 18:10:07,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 18:10:07,744 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:10:07,744 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 18:10:07,751 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 14 treesize of output 16 [2022-12-13 18:10:07,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:10:07,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:10:07,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 18:10:07,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:10:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:09,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:10:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:10:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:10:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:12,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102331977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:10:12,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:10:12,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 28] total 86 [2022-12-13 18:10:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003798995] [2022-12-13 18:10:12,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:10:12,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-13 18:10:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:10:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-13 18:10:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=6673, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 18:10:12,712 INFO L87 Difference]: Start difference. First operand 217 states and 240 transitions. Second operand has 87 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 87 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:10:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:10:28,097 INFO L93 Difference]: Finished difference Result 280 states and 301 transitions. [2022-12-13 18:10:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 18:10:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 87 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-13 18:10:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:10:28,099 INFO L225 Difference]: With dead ends: 280 [2022-12-13 18:10:28,099 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 18:10:28,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=3348, Invalid=22734, Unknown=0, NotChecked=0, Total=26082 [2022-12-13 18:10:28,100 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1193 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:10:28,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 1348 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3064 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 18:10:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 18:10:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 66. [2022-12-13 18:10:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:10:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-12-13 18:10:28,102 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 56 [2022-12-13 18:10:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:10:28,102 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-12-13 18:10:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 87 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:10:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-12-13 18:10:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 18:10:28,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:10:28,102 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:10:28,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:10:28,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 18:10:28,304 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:10:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:10:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2070188021, now seen corresponding path program 7 times [2022-12-13 18:10:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:10:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647123352] [2022-12-13 18:10:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:10:28,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:10:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:10:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:28,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:10:28,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647123352] [2022-12-13 18:10:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647123352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:10:28,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320773588] [2022-12-13 18:10:28,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:10:28,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:10:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:10:28,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:10:28,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:10:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:10:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 18:10:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:10:29,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:10:29,235 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 14 treesize of output 16 [2022-12-13 18:10:29,242 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:10:29,242 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 18:10:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:10:29,735 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 27 treesize of output 23 [2022-12-13 18:10:30,039 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:10:30,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:10:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:30,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320773588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:10:30,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:10:30,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-12-13 18:10:30,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74466069] [2022-12-13 18:10:30,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:10:30,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 18:10:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:10:30,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 18:10:30,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 18:10:30,059 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 44 states have (on average 3.227272727272727) internal successors, (142), 45 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:10:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:10:31,111 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-12-13 18:10:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:10:31,111 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.227272727272727) internal successors, (142), 45 states have internal predecessors, (142), 0 states have call successors, (0), 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 58 [2022-12-13 18:10:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:10:31,111 INFO L225 Difference]: With dead ends: 72 [2022-12-13 18:10:31,111 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 18:10:31,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=666, Invalid=2874, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 18:10:31,112 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 555 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:10:31,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 420 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:10:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 18:10:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-12-13 18:10:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:10:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-12-13 18:10:31,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 58 [2022-12-13 18:10:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:10:31,114 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-12-13 18:10:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.227272727272727) internal successors, (142), 45 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:10:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-12-13 18:10:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 18:10:31,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:10:31,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:10:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:10:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 18:10:31,316 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:10:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:10:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1616627774, now seen corresponding path program 2 times [2022-12-13 18:10:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:10:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115042868] [2022-12-13 18:10:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:10:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:10:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:10:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:10:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:10:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115042868] [2022-12-13 18:10:32,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115042868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:10:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007102547] [2022-12-13 18:10:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:10:32,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:10:32,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:10:32,686 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:10:32,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:10:32,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:10:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:10:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-13 18:10:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:10:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:10:33,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 18:10:33,079 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:10:33,080 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 19 treesize of output 18 [2022-12-13 18:10:33,315 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:10:33,315 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 14 treesize of output 20 [2022-12-13 18:10:33,329 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:10:33,329 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 18:10:33,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:10:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:10:33,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 18:10:33,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:10:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:10:34,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:10:36,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:10:36,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:10:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:10:36,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007102547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:10:36,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:10:36,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 19] total 60 [2022-12-13 18:10:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509971000] [2022-12-13 18:10:36,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:10:36,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 18:10:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:10:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 18:10:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 18:10:36,057 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 61 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:10:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:10:40,664 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-12-13 18:10:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 18:10:40,664 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 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 64 [2022-12-13 18:10:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:10:40,664 INFO L225 Difference]: With dead ends: 76 [2022-12-13 18:10:40,664 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 18:10:40,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1046, Invalid=7884, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 18:10:40,665 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 300 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:10:40,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 443 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:10:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 18:10:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-12-13 18:10:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:10:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-12-13 18:10:40,666 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2022-12-13 18:10:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:10:40,666 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-12-13 18:10:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.5166666666666666) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:10:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-12-13 18:10:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 18:10:40,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:10:40,667 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:10:40,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:10:40,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 18:10:40,869 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:10:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:10:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1595605642, now seen corresponding path program 8 times [2022-12-13 18:10:40,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:10:40,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486905401] [2022-12-13 18:10:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:10:40,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:10:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:10:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:10:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486905401] [2022-12-13 18:10:41,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486905401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:10:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446242893] [2022-12-13 18:10:41,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:10:41,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:10:41,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:10:41,946 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:10:41,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:10:42,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:10:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:10:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-13 18:10:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:10:42,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:10:42,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:10:42,368 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:10:42,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:10:42,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:10:42,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:10:42,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:10:42,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:10:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:10:42,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:10:45,288 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2367) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:10:49,475 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2367) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:10:53,706 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2367) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:10:53,713 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2367 (Array Int Int)) (v_ArrVal_2363 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2363) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2367) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:10:56,172 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2367 (Array Int Int)) (v_ArrVal_2363 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2363) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_2367) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 4)) 0)) is different from false [2022-12-13 18:10:56,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:10:56,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:10:56,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:10:56,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:10:56,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:10:56,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:10:56,253 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:10:56,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:10:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 26 not checked. [2022-12-13 18:10:56,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446242893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:10:56,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:10:56,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 67 [2022-12-13 18:10:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613696311] [2022-12-13 18:10:56,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:10:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 18:10:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:10:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 18:10:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3478, Unknown=111, NotChecked=620, Total=4422 [2022-12-13 18:10:56,570 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:11:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:11:00,897 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2022-12-13 18:11:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 18:11:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 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 64 [2022-12-13 18:11:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:11:00,898 INFO L225 Difference]: With dead ends: 110 [2022-12-13 18:11:00,898 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 18:11:00,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=393, Invalid=5678, Unknown=111, NotChecked=790, Total=6972 [2022-12-13 18:11:00,898 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:11:00,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1000 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1495 Invalid, 3 Unknown, 316 Unchecked, 0.7s Time] [2022-12-13 18:11:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 18:11:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-12-13 18:11:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:11:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-12-13 18:11:00,899 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-12-13 18:11:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:11:00,900 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-12-13 18:11:00,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:11:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-12-13 18:11:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 18:11:00,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:11:00,900 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:11:00,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 18:11:01,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:01,102 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:11:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:11:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1757527917, now seen corresponding path program 9 times [2022-12-13 18:11:01,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:11:01,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884822804] [2022-12-13 18:11:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:11:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:11:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:11:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:01,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:11:01,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884822804] [2022-12-13 18:11:01,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884822804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:11:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104430170] [2022-12-13 18:11:01,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:11:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:11:01,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:11:01,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:11:02,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:11:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:11:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 18:11:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:11:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:11:02,828 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 14 treesize of output 16 [2022-12-13 18:11:02,833 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:11:02,833 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 18:11:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:03,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:11:03,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:11:03,399 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 11 treesize of output 9 [2022-12-13 18:11:03,404 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:11:03,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:11:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:03,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104430170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:11:03,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:11:03,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2022-12-13 18:11:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972030968] [2022-12-13 18:11:03,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:11:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 18:11:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:11:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 18:11:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 18:11:03,489 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 48 states, 47 states have (on average 3.702127659574468) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:11:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:11:04,332 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-12-13 18:11:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:11:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.702127659574468) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 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 68 [2022-12-13 18:11:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:11:04,333 INFO L225 Difference]: With dead ends: 77 [2022-12-13 18:11:04,333 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 18:11:04,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=783, Invalid=3377, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 18:11:04,333 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 634 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:11:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 299 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:11:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 18:11:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-12-13 18:11:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:11:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-13 18:11:04,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2022-12-13 18:11:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:11:04,335 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-13 18:11:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.702127659574468) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:11:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-13 18:11:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 18:11:04,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:11:04,336 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:11:04,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:11:04,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 18:11:04,536 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:11:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:11:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1529659500, now seen corresponding path program 10 times [2022-12-13 18:11:04,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:11:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782394886] [2022-12-13 18:11:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:11:04,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:11:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:11:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:06,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:11:06,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782394886] [2022-12-13 18:11:06,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782394886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:11:06,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693219233] [2022-12-13 18:11:06,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:11:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:06,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:11:06,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:11:06,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:11:06,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:11:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:11:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-13 18:11:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:11:06,514 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:11:06,515 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 19 treesize of output 18 [2022-12-13 18:11:06,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:11:06,990 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:11:06,991 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 18:11:07,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:11:07,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:07,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 24 treesize of output 12 [2022-12-13 18:11:07,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 19 [2022-12-13 18:11:07,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:07,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:07,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:07,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:11:07,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:11:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:07,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:11:07,870 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2734) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-13 18:11:08,168 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2734) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:11:12,159 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2731 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2731) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-13 18:11:12,271 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2731 (Array Int Int)) (v_ArrVal_2730 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_2730) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2731) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:11:12,277 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2731 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_2731) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) is different from false [2022-12-13 18:11:12,830 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2731 (Array Int Int)) (v_ArrVal_2729 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2729) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_2731) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ 5 |c_ULTIMATE.start_cstpncpy_#in~src#1.offset|)) 0)) is different from false [2022-12-13 18:11:12,834 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2731 (Array Int Int)) (v_ArrVal_2729 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_2729) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_2731) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ 5 |c_ULTIMATE.start_cstpncpy_#in~src#1.offset|)) 0)) is different from false [2022-12-13 18:11:12,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:11:12,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:11:12,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:11:12,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2022-12-13 18:11:12,929 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 54 treesize of output 46 [2022-12-13 18:11:12,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 18:11:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 46 not checked. [2022-12-13 18:11:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693219233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:11:13,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:11:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 29] total 78 [2022-12-13 18:11:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130562104] [2022-12-13 18:11:13,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:11:13,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 18:11:13,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:11:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 18:11:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4624, Unknown=139, NotChecked=1008, Total=6006 [2022-12-13 18:11:13,833 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 78 states, 78 states have (on average 2.2948717948717947) internal successors, (179), 78 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:11:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:11:18,115 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2022-12-13 18:11:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:11:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.2948717948717947) internal successors, (179), 78 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-13 18:11:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:11:18,116 INFO L225 Difference]: With dead ends: 126 [2022-12-13 18:11:18,116 INFO L226 Difference]: Without dead ends: 82 [2022-12-13 18:11:18,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 7 IntricatePredicates, 2 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=668, Invalid=9927, Unknown=145, NotChecked=1470, Total=12210 [2022-12-13 18:11:18,117 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 251 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 37 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:11:18,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1087 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1642 Invalid, 25 Unknown, 509 Unchecked, 1.2s Time] [2022-12-13 18:11:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-13 18:11:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-12-13 18:11:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 18:11:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-13 18:11:18,118 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-12-13 18:11:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:11:18,118 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-13 18:11:18,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.2948717948717947) internal successors, (179), 78 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:11:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-13 18:11:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 18:11:18,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:11:18,119 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 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] [2022-12-13 18:11:18,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 18:11:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 18:11:18,320 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:11:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:11:18,320 INFO L85 PathProgramCache]: Analyzing trace with hash -123927951, now seen corresponding path program 11 times [2022-12-13 18:11:18,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:11:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658407252] [2022-12-13 18:11:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:11:18,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:11:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:11:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:19,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:11:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658407252] [2022-12-13 18:11:19,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658407252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:11:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169573340] [2022-12-13 18:11:19,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:11:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:19,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:11:19,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:11:19,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:11:24,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 18:11:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:11:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 18:11:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:11:24,952 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:11:24,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:11:24,961 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:11:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:11:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:11:25,216 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 14 treesize of output 16 [2022-12-13 18:11:25,221 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:11:25,221 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 18:11:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:11:31,803 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:11:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:42,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169573340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:11:42,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:11:42,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 51 [2022-12-13 18:11:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43420858] [2022-12-13 18:11:42,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:11:42,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 18:11:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:11:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 18:11:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 18:11:42,712 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 52 states, 51 states have (on average 3.764705882352941) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 18:11:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:11:43,893 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2022-12-13 18:11:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:11:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.764705882352941) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-13 18:11:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:11:43,894 INFO L225 Difference]: With dead ends: 87 [2022-12-13 18:11:43,894 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 18:11:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1013, Invalid=3957, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 18:11:43,895 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 624 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:11:43,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 394 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:11:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 18:11:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-12-13 18:11:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:11:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-12-13 18:11:43,897 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 78 [2022-12-13 18:11:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:11:43,897 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-12-13 18:11:43,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.764705882352941) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 18:11:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-12-13 18:11:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 18:11:43,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:11:43,898 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:11:43,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 18:11:44,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:44,100 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:11:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:11:44,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2047124210, now seen corresponding path program 12 times [2022-12-13 18:11:44,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:11:44,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104272526] [2022-12-13 18:11:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:11:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:11:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:11:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:11:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104272526] [2022-12-13 18:11:45,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104272526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:11:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580330830] [2022-12-13 18:11:45,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:11:45,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:45,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:11:45,798 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:11:45,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:11:49,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 18:11:49,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:11:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 186 conjunts are in the unsatisfiable core [2022-12-13 18:11:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:11:49,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:11:49,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:11:49,953 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:11:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:11:50,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:11:50,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:50,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:11:50,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:11:50,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:11:50,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:50,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:11:50,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:50,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:51,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:51,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:51,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:11:51,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:11:51,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:11:51,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-13 18:11:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:11:52,373 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3152 (Array Int Int)) (v_ArrVal_3154 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3152) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3154) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:11:52,491 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3150 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3150) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-13 18:11:52,544 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3149 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3149) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-13 18:11:52,814 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3148 (Array Int Int)) (v_ArrVal_3149 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_3148) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_3149) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 6)) 0)) is different from false [2022-12-13 18:11:53,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:11:53,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:11:53,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:11:53,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:11:53,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:11:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:11:53,446 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:11:53,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:11:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2022-12-13 18:11:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580330830] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:11:54,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:11:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 32] total 91 [2022-12-13 18:11:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610897943] [2022-12-13 18:11:54,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:11:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-13 18:11:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:11:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-13 18:11:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=7020, Unknown=182, NotChecked=692, Total=8190 [2022-12-13 18:11:54,003 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 91 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:11:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:11:58,755 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-12-13 18:11:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 18:11:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-12-13 18:11:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:11:58,756 INFO L225 Difference]: With dead ends: 142 [2022-12-13 18:11:58,756 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 18:11:58,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3342 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=768, Invalid=14060, Unknown=194, NotChecked=980, Total=16002 [2022-12-13 18:11:58,760 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 303 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 25 mSolverCounterUnsat, 123 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 123 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:11:58,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1637 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2550 Invalid, 123 Unknown, 342 Unchecked, 1.7s Time] [2022-12-13 18:11:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 18:11:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-12-13 18:11:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:11:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-12-13 18:11:58,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-12-13 18:11:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:11:58,763 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-12-13 18:11:58,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.3846153846153846) internal successors, (217), 91 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:11:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-12-13 18:11:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 18:11:58,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:11:58,764 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:11:58,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 18:11:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 18:11:58,964 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:11:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:11:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1064449423, now seen corresponding path program 13 times [2022-12-13 18:11:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:11:58,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025887688] [2022-12-13 18:11:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:11:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:11:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:11:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:11:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:11:59,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025887688] [2022-12-13 18:11:59,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025887688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:11:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567310790] [2022-12-13 18:11:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:11:59,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:11:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:11:59,899 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:11:59,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:12:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 18:12:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:12:00,394 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 14 treesize of output 16 [2022-12-13 18:12:00,400 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:12:00,400 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 18:12:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 66 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:00,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:01,197 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 27 treesize of output 23 [2022-12-13 18:12:01,741 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:12:01,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:12:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 55 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567310790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:01,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:12:01,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 59 [2022-12-13 18:12:01,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324354460] [2022-12-13 18:12:01,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 18:12:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:12:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 18:12:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=3194, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 18:12:01,759 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 60 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 18:12:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:12:03,130 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-12-13 18:12:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 18:12:03,130 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 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 88 [2022-12-13 18:12:03,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:12:03,131 INFO L225 Difference]: With dead ends: 97 [2022-12-13 18:12:03,131 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 18:12:03,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1248, Invalid=5232, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 18:12:03,131 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 643 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:12:03,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 581 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:12:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 18:12:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-12-13 18:12:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-12-13 18:12:03,133 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2022-12-13 18:12:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:12:03,133 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-12-13 18:12:03,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 60 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 18:12:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-12-13 18:12:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 18:12:03,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:12:03,134 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:03,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 18:12:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 18:12:03,335 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:12:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1646098544, now seen corresponding path program 14 times [2022-12-13 18:12:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:12:03,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289688491] [2022-12-13 18:12:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:12:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:12:05,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289688491] [2022-12-13 18:12:05,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289688491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:12:05,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998797352] [2022-12-13 18:12:05,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:12:05,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:12:05,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:12:05,578 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:12:05,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:12:05,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:12:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:12:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 156 conjunts are in the unsatisfiable core [2022-12-13 18:12:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:05,805 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:12:05,805 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 19 treesize of output 18 [2022-12-13 18:12:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:12:06,461 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:12:06,461 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 18:12:06,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:12:06,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:12:06,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 24 treesize of output 12 [2022-12-13 18:12:06,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 19 [2022-12-13 18:12:07,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:12:07,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:07,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:07,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:07,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:07,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:07,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:12:07,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:12:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:07,721 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3618 (Array Int Int)) (v_ArrVal_3619 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3618) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:12:07,728 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:12:07,737 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3617 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3617) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:12:07,743 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:12:07,753 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3616 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3616) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:12:07,872 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3615 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_3615) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:12:13,239 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3612 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_3612) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ 7 |c_ULTIMATE.start_cstpncpy_~src#1.offset|)) 0)) is different from false [2022-12-13 18:12:13,244 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3612 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_3612) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ 7 |c_ULTIMATE.start_cstpncpy_~src#1.offset|)) 0)) is different from false [2022-12-13 18:12:13,504 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3619 (Array Int Int)) (v_ArrVal_3612 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_3612) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_3619) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ 7 |c_ULTIMATE.start_cstpncpy_#in~src#1.offset|)) 0)) is different from false [2022-12-13 18:12:13,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:12:13,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:12:13,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:12:13,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 130 [2022-12-13 18:12:13,623 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 118 treesize of output 102 [2022-12-13 18:12:13,626 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 102 treesize of output 94 [2022-12-13 18:12:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 92 not checked. [2022-12-13 18:12:15,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998797352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:15,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:12:15,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35, 35] total 96 [2022-12-13 18:12:15,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483946632] [2022-12-13 18:12:15,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 18:12:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:12:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 18:12:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=6952, Unknown=272, NotChecked=1602, Total=9120 [2022-12-13 18:12:15,006 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 96 states, 96 states have (on average 2.4270833333333335) internal successors, (233), 96 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:12:21,016 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2022-12-13 18:12:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 18:12:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.4270833333333335) internal successors, (233), 96 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-12-13 18:12:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:12:21,017 INFO L225 Difference]: With dead ends: 158 [2022-12-13 18:12:21,017 INFO L226 Difference]: Without dead ends: 102 [2022-12-13 18:12:21,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=807, Invalid=15195, Unknown=290, NotChecked=2340, Total=18632 [2022-12-13 18:12:21,018 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 3664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 854 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:12:21,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1765 Invalid, 3664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2769 Invalid, 0 Unknown, 854 Unchecked, 1.8s Time] [2022-12-13 18:12:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-13 18:12:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-12-13 18:12:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:12:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-12-13 18:12:21,020 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-12-13 18:12:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:12:21,020 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-12-13 18:12:21,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.4270833333333335) internal successors, (233), 96 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-12-13 18:12:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 18:12:21,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:12:21,021 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:21,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 18:12:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 18:12:21,222 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:12:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash -45925907, now seen corresponding path program 15 times [2022-12-13 18:12:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:12:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382664876] [2022-12-13 18:12:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:12:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 66 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:22,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:12:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382664876] [2022-12-13 18:12:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382664876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:12:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166796376] [2022-12-13 18:12:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:12:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:12:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:12:22,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:12:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:12:27,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 18:12:27,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:12:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 18:12:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:27,182 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:12:27,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:12:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:12:27,442 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 14 treesize of output 16 [2022-12-13 18:12:27,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:12:27,450 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 18:12:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:27,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:28,592 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:12:28,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:12:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166796376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:29,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:12:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2022-12-13 18:12:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998198680] [2022-12-13 18:12:29,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-13 18:12:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:12:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-13 18:12:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=4543, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 18:12:29,394 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 72 states, 71 states have (on average 4.028169014084507) internal successors, (286), 72 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:12:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:12:31,573 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2022-12-13 18:12:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 18:12:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.028169014084507) internal successors, (286), 72 states have internal predecessors, (286), 0 states have call successors, (0), 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 98 [2022-12-13 18:12:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:12:31,574 INFO L225 Difference]: With dead ends: 107 [2022-12-13 18:12:31,574 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:12:31,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1725, Invalid=7205, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 18:12:31,574 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 646 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:12:31,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 595 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:12:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:12:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-12-13 18:12:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-12-13 18:12:31,575 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 98 [2022-12-13 18:12:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:12:31,576 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-12-13 18:12:31,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.028169014084507) internal successors, (286), 72 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:12:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-12-13 18:12:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-13 18:12:31,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:12:31,576 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:31,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 18:12:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:12:31,778 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:12:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 6966638, now seen corresponding path program 16 times [2022-12-13 18:12:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:12:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534767020] [2022-12-13 18:12:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:12:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:34,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:12:34,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534767020] [2022-12-13 18:12:34,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534767020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:12:34,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468507291] [2022-12-13 18:12:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:12:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:12:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:12:34,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:12:34,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 18:12:36,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:12:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:12:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 176 conjunts are in the unsatisfiable core [2022-12-13 18:12:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:36,578 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:12:36,579 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 19 treesize of output 18 [2022-12-13 18:12:37,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:12:37,255 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:12:37,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:12:37,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:12:37,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:12:37,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:12:37,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:12:37,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:38,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:38,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:38,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:38,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:39,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:39,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:12:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:12:39,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:12:39,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-13 18:12:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:39,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:39,526 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4135 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4135) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-13 18:12:46,981 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4133 (Array Int Int)) (v_ArrVal_4135 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4133) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4135) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:12:47,124 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4131 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4131) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-13 18:12:47,202 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4130 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4130) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|))) is different from false [2022-12-13 18:12:47,502 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstpncpy_~d~0#1.base| |c_ULTIMATE.start_cstpncpy_~s~0#1.base|)) (forall ((v_ArrVal_4128 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4128) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0))) is different from false [2022-12-13 18:12:47,641 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4127 (Array Int Int)) (v_ArrVal_4128 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4127) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4128) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-13 18:12:47,646 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4127 (Array Int Int)) (v_ArrVal_4128 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4127) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_4128) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 8)) 0)) is different from false [2022-12-13 18:12:47,839 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4127 (Array Int Int)) (v_ArrVal_4128 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4127) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_4128) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 8)) 0)) is different from false [2022-12-13 18:12:48,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:12:48,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:12:48,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:12:48,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2022-12-13 18:12:48,119 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 54 treesize of output 46 [2022-12-13 18:12:48,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 18:12:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 60 not checked. [2022-12-13 18:12:49,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468507291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:49,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:12:49,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 38, 38] total 108 [2022-12-13 18:12:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102869622] [2022-12-13 18:12:49,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:49,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-13 18:12:49,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:12:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-13 18:12:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=9455, Unknown=139, NotChecked=1624, Total=11556 [2022-12-13 18:12:49,731 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 108 states, 108 states have (on average 2.509259259259259) internal successors, (271), 108 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 18:12:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:12:58,036 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2022-12-13 18:12:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 18:12:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.509259259259259) internal successors, (271), 108 states have internal predecessors, (271), 0 states have call successors, (0), 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 104 [2022-12-13 18:12:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:12:58,036 INFO L225 Difference]: With dead ends: 174 [2022-12-13 18:12:58,036 INFO L226 Difference]: Without dead ends: 112 [2022-12-13 18:12:58,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 4399 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=979, Invalid=20954, Unknown=151, NotChecked=2408, Total=24492 [2022-12-13 18:12:58,038 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 373 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 39 mSolverCounterUnsat, 191 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 4783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 191 IncrementalHoareTripleChecker+Unknown, 852 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:12:58,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 2352 Invalid, 4783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3701 Invalid, 191 Unknown, 852 Unchecked, 3.1s Time] [2022-12-13 18:12:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-13 18:12:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-12-13 18:12:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-12-13 18:12:58,039 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-12-13 18:12:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:12:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-12-13 18:12:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.509259259259259) internal successors, (271), 108 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 18:12:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-12-13 18:12:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 18:12:58,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:12:58,039 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:58,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 18:12:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 18:12:58,241 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:12:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1020694645, now seen corresponding path program 17 times [2022-12-13 18:12:58,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:12:58,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939691061] [2022-12-13 18:12:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:12:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 91 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:59,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:12:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939691061] [2022-12-13 18:12:59,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939691061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:12:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46676392] [2022-12-13 18:12:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:12:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:12:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:12:59,330 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:12:59,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 18:13:56,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 18:13:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:13:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 18:13:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:56,528 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:13:56,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:13:56,540 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:13:56,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:13:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:13:56,894 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 14 treesize of output 16 [2022-12-13 18:13:56,899 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:13:56,899 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 18:13:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 120 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:57,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:03,726 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:14:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 120 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46676392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:08,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:14:08,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 66 [2022-12-13 18:14:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306533368] [2022-12-13 18:14:08,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 18:14:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 18:14:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3926, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 18:14:08,995 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 67 states, 66 states have (on average 4.0) internal successors, (264), 67 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 18:14:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:10,202 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-12-13 18:14:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:14:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.0) internal successors, (264), 67 states have internal predecessors, (264), 0 states have call successors, (0), 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 108 [2022-12-13 18:14:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:10,202 INFO L225 Difference]: With dead ends: 117 [2022-12-13 18:14:10,202 INFO L226 Difference]: Without dead ends: 117 [2022-12-13 18:14:10,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1721, Invalid=6651, Unknown=0, NotChecked=0, Total=8372 [2022-12-13 18:14:10,203 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1058 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:10,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 671 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-13 18:14:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-12-13 18:14:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 18:14:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-12-13 18:14:10,204 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2022-12-13 18:14:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:10,205 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-12-13 18:14:10,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.0) internal successors, (264), 67 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 18:14:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-12-13 18:14:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 18:14:10,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:10,205 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:10,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 18:14:10,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:10,407 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:14:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1842522996, now seen corresponding path program 18 times [2022-12-13 18:14:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122541290] [2022-12-13 18:14:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:13,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122541290] [2022-12-13 18:14:13,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122541290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271339376] [2022-12-13 18:14:13,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:14:13,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:13,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:13,279 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:13,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 18:14:39,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-13 18:14:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:14:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 244 conjunts are in the unsatisfiable core [2022-12-13 18:14:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:14:40,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:14:40,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:14:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:14:40,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:14:40,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:14:40,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:14:40,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:14:40,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:14:41,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:14:41,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:41,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:41,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:42,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:42,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:42,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:42,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:43,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:43,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:14:43,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:14:43,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:14:43,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-13 18:14:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:43,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:43,554 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4703 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-13 18:14:43,561 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4703 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:14:50,048 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4701 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4701) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:14:50,055 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4703 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:14:50,064 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4700 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4700) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)))) is different from false [2022-12-13 18:14:50,199 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4699 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4699) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:14:50,342 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4698 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4698) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) is different from false [2022-12-13 18:14:50,350 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4703 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 6)))) is different from false [2022-12-13 18:14:56,691 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4703 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0)) is different from false [2022-12-13 18:14:56,701 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4696 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_4696) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0)) is different from false [2022-12-13 18:15:03,734 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4694) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstpncpy_~src#1.offset|)) 0)) is different from false [2022-12-13 18:15:03,740 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4694) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstpncpy_~src#1.offset|)) 0)) is different from false [2022-12-13 18:15:06,056 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4694 (Array Int Int)) (v_ArrVal_4703 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_4694) |c_ULTIMATE.start_cstpncpy_#in~dst#1.base| v_ArrVal_4703) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 9)) 0)) is different from false [2022-12-13 18:15:06,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:06,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:15:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:15:06,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:06,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:15:06,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:15:06,192 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:15:06,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:15:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 190 not checked. [2022-12-13 18:15:07,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271339376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:07,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:07,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 41, 41] total 125 [2022-12-13 18:15:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311433822] [2022-12-13 18:15:07,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-12-13 18:15:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-12-13 18:15:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=11840, Unknown=245, NotChecked=3016, Total=15500 [2022-12-13 18:15:07,077 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 125 states, 125 states have (on average 2.536) internal successors, (317), 125 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:15:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:19,503 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-12-13 18:15:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 18:15:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.536) internal successors, (317), 125 states have internal predecessors, (317), 0 states have call successors, (0), 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 114 [2022-12-13 18:15:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:19,505 INFO L225 Difference]: With dead ends: 190 [2022-12-13 18:15:19,505 INFO L226 Difference]: Without dead ends: 122 [2022-12-13 18:15:19,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 173 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=1028, Invalid=24850, Unknown=256, NotChecked=4316, Total=30450 [2022-12-13 18:15:19,506 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 330 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 34 mSolverCounterUnsat, 107 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 6105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 107 IncrementalHoareTripleChecker+Unknown, 1492 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:19,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 2874 Invalid, 6105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4472 Invalid, 107 Unknown, 1492 Unchecked, 3.7s Time] [2022-12-13 18:15:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-13 18:15:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-12-13 18:15:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:15:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-12-13 18:15:19,508 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-12-13 18:15:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:19,508 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-12-13 18:15:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.536) internal successors, (317), 125 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:15:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-12-13 18:15:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 18:15:19,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:19,509 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:19,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:19,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 18:15:19,710 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:15:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1876047465, now seen corresponding path program 19 times [2022-12-13 18:15:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780160029] [2022-12-13 18:15:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 120 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:21,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780160029] [2022-12-13 18:15:21,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780160029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:21,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516867711] [2022-12-13 18:15:21,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:15:21,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:21,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:21,313 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:21,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 18:15:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-13 18:15:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:22,152 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 14 treesize of output 16 [2022-12-13 18:15:22,160 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:15:22,160 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 18:15:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 153 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:22,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:23,404 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 27 treesize of output 23 [2022-12-13 18:15:24,305 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:15:24,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:15:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 136 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:24,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516867711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:24,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:24,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 73 [2022-12-13 18:15:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809968071] [2022-12-13 18:15:24,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:24,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-13 18:15:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-13 18:15:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=4895, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 18:15:24,332 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 74 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 74 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:15:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:27,869 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2022-12-13 18:15:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 18:15:27,869 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 74 states have internal predecessors, (286), 0 states have call successors, (0), 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 118 [2022-12-13 18:15:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:27,870 INFO L225 Difference]: With dead ends: 127 [2022-12-13 18:15:27,870 INFO L226 Difference]: Without dead ends: 127 [2022-12-13 18:15:27,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2423, Invalid=9787, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 18:15:27,871 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1390 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 939 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 18:15:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-13 18:15:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-13 18:15:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-12-13 18:15:27,873 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 118 [2022-12-13 18:15:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:27,873 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-12-13 18:15:27,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 74 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:15:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-12-13 18:15:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 18:15:27,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:27,874 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:27,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 18:15:28,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 18:15:28,075 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:15:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash 307297514, now seen corresponding path program 20 times [2022-12-13 18:15:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179723877] [2022-12-13 18:15:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:28,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:31,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179723877] [2022-12-13 18:15:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179723877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434930689] [2022-12-13 18:15:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:15:31,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:31,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:31,411 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:31,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 18:15:31,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:15:31,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:31,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 198 conjunts are in the unsatisfiable core [2022-12-13 18:15:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:31,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:15:32,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:15:32,693 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:15:32,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:15:32,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:15:32,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:15:33,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 [2022-12-13 18:15:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:15:33,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:15:33,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:33,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:33,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:33,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:34,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:34,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:34,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:34,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:15:34,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:15:34,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:15:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:34,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:34,419 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) |c_ULTIMATE.start_cstpncpy_~s~0#1.offset|) 0)) is different from false [2022-12-13 18:15:34,606 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5312 (Array Int Int)) (v_ArrVal_5313 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5312) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:15:43,391 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:15:49,745 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:15:53,136 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 5)) 0)) is different from false [2022-12-13 18:15:56,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 6)) 0)) is different from false [2022-12-13 18:16:01,153 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int)) (v_ArrVal_5306 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5306) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 7)) 0)) is different from false [2022-12-13 18:16:11,539 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 10)) 0)) is different from false [2022-12-13 18:16:11,548 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5303 (Array Int Int)) (v_ArrVal_5313 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5303) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 10)) 0)) is different from false [2022-12-13 18:16:11,555 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5303 (Array Int Int)) (v_ArrVal_5313 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5303) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 10)) 0)) is different from false [2022-12-13 18:16:11,561 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5303 (Array Int Int)) (v_ArrVal_5313 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5303) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_5313) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 10)) 0)) is different from false [2022-12-13 18:16:15,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:15,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:16:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:16:15,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:15,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:16:15,490 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:16:15,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:16:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 188 not checked. [2022-12-13 18:16:15,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434930689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:16:15,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:16:15,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 44, 44] total 112 [2022-12-13 18:16:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775202262] [2022-12-13 18:16:15,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:16:15,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-12-13 18:16:15,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-12-13 18:16:15,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=9423, Unknown=367, NotChecked=2288, Total=12432 [2022-12-13 18:16:15,987 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 112 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 18:16:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:16:24,046 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2022-12-13 18:16:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 18:16:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 112 states have internal predecessors, (277), 0 states have call successors, (0), 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 124 [2022-12-13 18:16:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:16:24,047 INFO L225 Difference]: With dead ends: 206 [2022-12-13 18:16:24,047 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 18:16:24,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 152 ConstructedPredicates, 11 IntricatePredicates, 1 DeprecatedPredicates, 4155 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=853, Invalid=19126, Unknown=371, NotChecked=3212, Total=23562 [2022-12-13 18:16:24,049 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 220 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 4453 mSolverCounterSat, 42 mSolverCounterUnsat, 159 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 5946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4453 IncrementalHoareTripleChecker+Invalid, 159 IncrementalHoareTripleChecker+Unknown, 1292 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:16:24,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 2906 Invalid, 5946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4453 Invalid, 159 Unknown, 1292 Unchecked, 3.3s Time] [2022-12-13 18:16:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 18:16:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-12-13 18:16:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-12-13 18:16:24,051 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-12-13 18:16:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:16:24,051 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-12-13 18:16:24,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 112 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 18:16:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-12-13 18:16:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-13 18:16:24,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:16:24,051 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:24,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 18:16:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 18:16:24,253 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:16:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1115754873, now seen corresponding path program 21 times [2022-12-13 18:16:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573088557] [2022-12-13 18:16:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:24,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 153 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573088557] [2022-12-13 18:16:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573088557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773013106] [2022-12-13 18:16:25,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:16:25,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:25,878 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:25,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 18:17:28,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 18:17:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-13 18:17:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:29,280 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 14 treesize of output 16 [2022-12-13 18:17:29,287 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:17:29,287 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 18:17:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 190 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:29,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:17:30,845 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 11 treesize of output 9 [2022-12-13 18:17:30,851 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:17:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-13 18:17:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 190 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:31,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773013106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:31,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:31,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 78 [2022-12-13 18:17:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791897722] [2022-12-13 18:17:31,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-13 18:17:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-13 18:17:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=5432, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 18:17:31,189 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 79 states, 78 states have (on average 4.230769230769231) internal successors, (330), 79 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 18:17:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:17:33,435 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2022-12-13 18:17:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 18:17:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 4.230769230769231) internal successors, (330), 79 states have internal predecessors, (330), 0 states have call successors, (0), 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 128 [2022-12-13 18:17:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:17:33,436 INFO L225 Difference]: With dead ends: 137 [2022-12-13 18:17:33,436 INFO L226 Difference]: Without dead ends: 137 [2022-12-13 18:17:33,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 197 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2198, Invalid=9358, Unknown=0, NotChecked=0, Total=11556 [2022-12-13 18:17:33,437 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 822 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:17:33,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 814 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:17:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-13 18:17:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-12-13 18:17:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-12-13 18:17:33,439 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2022-12-13 18:17:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:17:33,439 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-12-13 18:17:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 4.230769230769231) internal successors, (330), 79 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 18:17:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-12-13 18:17:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 18:17:33,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:17:33,439 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:33,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 18:17:33,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:33,640 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:17:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash 479110792, now seen corresponding path program 22 times [2022-12-13 18:17:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:33,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024730062] [2022-12-13 18:17:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024730062] [2022-12-13 18:17:37,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024730062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384108330] [2022-12-13 18:17:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:17:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:37,570 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 18:17:42,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:17:42,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 222 conjunts are in the unsatisfiable core [2022-12-13 18:17:42,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:42,168 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:17:42,169 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 19 treesize of output 18 [2022-12-13 18:17:43,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:17:43,511 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-13 18:17:43,511 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 18:17:43,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:17:43,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:17:43,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 24 treesize of output 12 [2022-12-13 18:17:44,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 19 [2022-12-13 18:17:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:17:44,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:44,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:44,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:44,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:44,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:45,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:45,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:45,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:45,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:17:45,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:17:45,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:17:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:45,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:45,816 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-13 18:17:51,196 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 2)) 0)) is different from false [2022-12-13 18:17:55,825 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:17:55,836 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5971 (Array Int Int)) (v_ArrVal_5974 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5971) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 3)) 0)) is different from false [2022-12-13 18:17:55,844 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-13 18:18:26,938 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int)) (v_ArrVal_5966 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5966) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-13 18:18:27,126 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int)) (v_ArrVal_5965 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5965) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 9)) 0)) is different from false [2022-12-13 18:18:27,133 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 10)) 0)) is different from false [2022-12-13 18:18:27,143 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int)) (v_ArrVal_5964 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_#t~post5#1.base| v_ArrVal_5964) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 10)) 0)) is different from false [2022-12-13 18:18:27,150 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5974 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 11)) 0)) is different from false [2022-12-13 18:18:27,157 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5963 (Array Int Int)) (v_ArrVal_5974 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5963) |c_ULTIMATE.start_cstpncpy_~d~0#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~s~0#1.offset| 11)) 0)) is different from false [2022-12-13 18:18:27,163 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5963 (Array Int Int)) (v_ArrVal_5974 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5963) |c_ULTIMATE.start_cstpncpy_#t~mem2#1.base| v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_~src#1.offset| 11)) 0)) is different from false [2022-12-13 18:18:27,468 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5963 (Array Int Int)) (v_ArrVal_5974 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstpncpy_~#dst#1.base| v_ArrVal_5963) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_cstpncpy_~#dst#1.base|) |c_ULTIMATE.start_cstpncpy_~#dst#1.offset|) v_ArrVal_5974) |c_ULTIMATE.start_cstpncpy_#in~src#1.base|) (+ |c_ULTIMATE.start_cstpncpy_#in~src#1.offset| 11)) 0)) is different from false [2022-12-13 18:18:29,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:18:29,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:18:29,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:18:29,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2022-12-13 18:18:29,219 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 54 treesize of output 46 [2022-12-13 18:18:29,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 18:18:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 252 not checked. [2022-12-13 18:18:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384108330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:31,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:31,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 47, 47] total 134 [2022-12-13 18:18:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952823841] [2022-12-13 18:18:31,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-12-13 18:18:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-12-13 18:18:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=13723, Unknown=434, NotChecked=3250, Total=17822 [2022-12-13 18:18:31,798 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 134 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 18:18:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:18:42,596 INFO L93 Difference]: Finished difference Result 222 states and 223 transitions. [2022-12-13 18:18:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 18:18:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 134 states have internal predecessors, (346), 0 states have call successors, (0), 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 134 [2022-12-13 18:18:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:18:42,597 INFO L225 Difference]: With dead ends: 222 [2022-12-13 18:18:42,598 INFO L226 Difference]: Without dead ends: 142 [2022-12-13 18:18:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 192 SyntacticMatches, 12 SemanticMatches, 175 ConstructedPredicates, 13 IntricatePredicates, 1 DeprecatedPredicates, 5084 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=733, Invalid=25598, Unknown=453, NotChecked=4368, Total=31152 [2022-12-13 18:18:42,599 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 60 mSDsluCounter, 3914 mSDsCounter, 0 mSdLazyCounter, 6109 mSolverCounterSat, 46 mSolverCounterUnsat, 92 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 7708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6109 IncrementalHoareTripleChecker+Invalid, 92 IncrementalHoareTripleChecker+Unknown, 1461 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:18:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3967 Invalid, 7708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6109 Invalid, 92 Unknown, 1461 Unchecked, 5.3s Time] [2022-12-13 18:18:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-13 18:18:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-12-13 18:18:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 18:18:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-12-13 18:18:42,601 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-12-13 18:18:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:18:42,601 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-12-13 18:18:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 134 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 18:18:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-12-13 18:18:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-13 18:18:42,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:18:42,601 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:42,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 18:18:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-12-13 18:18:42,803 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 18:18:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 268761061, now seen corresponding path program 23 times [2022-12-13 18:18:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:18:42,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753715464] [2022-12-13 18:18:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:18:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 190 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:18:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753715464] [2022-12-13 18:18:44,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753715464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:18:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514249017] [2022-12-13 18:18:44,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:18:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:18:44,647 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:18:44,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47222c7a-1a1e-4489-a042-97b090c50f19/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process