./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a --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 64bit --witnessprinter.graph.data.programhash ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 --- 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-b5237d8 [2022-11-21 17:05:24,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:05:24,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:05:24,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:05:24,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:05:24,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:05:24,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:05:24,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:05:24,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:05:24,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:05:24,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:05:24,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:05:24,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:05:24,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:05:24,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:05:24,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:05:24,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:05:24,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:05:24,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:05:24,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:05:24,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:05:24,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:05:24,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:05:24,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:05:24,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:05:24,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:05:24,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:05:24,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:05:24,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:05:24,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:05:24,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:05:24,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:05:24,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:05:24,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:05:24,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:05:24,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:05:24,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:05:24,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:05:24,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:05:24,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:05:24,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:05:24,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-21 17:05:24,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:05:24,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:05:24,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:05:24,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:05:24,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:05:24,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:05:24,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:05:24,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:05:24,582 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:05:24,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:05:24,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:05:24,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:05:24,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:05:24,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 17:05:24,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 17:05:24,584 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 17:05:24,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:05:24,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:05:24,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:05:24,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:05:24,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:05:24,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:05:24,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:05:24,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:05:24,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:05:24,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:05:24,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:05:24,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 [2022-11-21 17:05:24,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:05:24,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:05:24,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:05:25,000 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:05:25,001 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:05:25,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2022-11-21 17:05:28,786 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:05:29,140 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:05:29,141 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2022-11-21 17:05:29,154 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/data/b7991a16b/5854fa19ed6c44c989400b9c93d8e686/FLAG9a17ecad6 [2022-11-21 17:05:29,173 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/data/b7991a16b/5854fa19ed6c44c989400b9c93d8e686 [2022-11-21 17:05:29,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:05:29,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:05:29,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:05:29,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:05:29,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:05:29,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5df7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29, skipping insertion in model container [2022-11-21 17:05:29,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:05:29,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:05:29,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:05:29,711 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:05:29,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:05:29,802 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:05:29,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29 WrapperNode [2022-11-21 17:05:29,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:05:29,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:05:29,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:05:29,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:05:29,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,859 INFO L138 Inliner]: procedures = 113, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2022-11-21 17:05:29,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:05:29,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:05:29,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:05:29,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:05:29,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:05:29,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:05:29,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:05:29,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:05:29,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (1/1) ... [2022-11-21 17:05:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:05:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:29,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:05:29,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:05:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:05:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:05:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 17:05:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:05:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 17:05:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:05:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:05:30,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:05:30,226 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:05:30,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:05:30,765 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:05:30,773 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:05:30,780 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 17:05:30,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:05:30 BoogieIcfgContainer [2022-11-21 17:05:30,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:05:30,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:05:30,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:05:30,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:05:30,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:05:29" (1/3) ... [2022-11-21 17:05:30,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658a12da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:05:30, skipping insertion in model container [2022-11-21 17:05:30,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:29" (2/3) ... [2022-11-21 17:05:30,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658a12da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:05:30, skipping insertion in model container [2022-11-21 17:05:30,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:05:30" (3/3) ... [2022-11-21 17:05:30,802 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca-2.i [2022-11-21 17:05:30,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:05:30,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-21 17:05:30,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:05:30,880 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a0d6e28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:05:30,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-21 17:05:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:05:30,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:30,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:05:30,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-11-21 17:05:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643799179] [2022-11-21 17:05:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:31,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643799179] [2022-11-21 17:05:31,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643799179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:31,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:31,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:05:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738741520] [2022-11-21 17:05:31,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:31,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:05:31,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:05:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:31,354 INFO L87 Difference]: Start difference. First operand has 53 states, 31 states have (on average 1.935483870967742) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:31,466 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-11-21 17:05:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:05:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 17:05:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:31,489 INFO L225 Difference]: With dead ends: 52 [2022-11-21 17:05:31,490 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 17:05:31,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:31,496 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:31,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 17:05:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-21 17:05:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 49 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) [2022-11-21 17:05:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-21 17:05:31,541 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 6 [2022-11-21 17:05:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:31,542 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-21 17:05:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-21 17:05:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:05:31,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:31,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:05:31,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:05:31,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-11-21 17:05:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:31,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141284393] [2022-11-21 17:05:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:31,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141284393] [2022-11-21 17:05:31,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141284393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:31,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:31,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:05:31,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156586220] [2022-11-21 17:05:31,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:31,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:05:31,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:31,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:05:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:05:31,974 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:32,072 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-11-21 17:05:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:05:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 17:05:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:32,074 INFO L225 Difference]: With dead ends: 96 [2022-11-21 17:05:32,075 INFO L226 Difference]: Without dead ends: 96 [2022-11-21 17:05:32,075 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 [2022-11-21 17:05:32,077 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:32,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 131 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-21 17:05:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 53. [2022-11-21 17:05:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-11-21 17:05:32,087 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 6 [2022-11-21 17:05:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:32,087 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-11-21 17:05:32,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-11-21 17:05:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:05:32,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:32,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:05:32,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:05:32,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:32,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-11-21 17:05:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366236744] [2022-11-21 17:05:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:32,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366236744] [2022-11-21 17:05:32,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366236744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:32,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:32,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:05:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114322950] [2022-11-21 17:05:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:05:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:05:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:05:32,366 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:32,478 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-11-21 17:05:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:05:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 17:05:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:32,480 INFO L225 Difference]: With dead ends: 52 [2022-11-21 17:05:32,480 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 17:05:32,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:05:32,482 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 52 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:32,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 80 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 17:05:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-11-21 17:05:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.8) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-21 17:05:32,490 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 6 [2022-11-21 17:05:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:32,490 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-21 17:05:32,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-21 17:05:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:05:32,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:32,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:32,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:05:32,495 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash 121320236, now seen corresponding path program 1 times [2022-11-21 17:05:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782701103] [2022-11-21 17:05:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:32,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782701103] [2022-11-21 17:05:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782701103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:32,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:32,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:05:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136507025] [2022-11-21 17:05:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:32,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:05:32,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:05:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:32,636 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:32,730 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-21 17:05:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:05:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 17:05:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:32,731 INFO L225 Difference]: With dead ends: 43 [2022-11-21 17:05:32,731 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 17:05:32,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:32,734 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:32,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 17:05:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 17:05:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-21 17:05:32,740 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2022-11-21 17:05:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:32,741 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-21 17:05:32,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-21 17:05:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:05:32,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:32,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:32,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:05:32,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash 121320237, now seen corresponding path program 1 times [2022-11-21 17:05:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352286550] [2022-11-21 17:05:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:32,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352286550] [2022-11-21 17:05:32,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352286550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:32,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:32,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:05:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669642207] [2022-11-21 17:05:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:32,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:05:32,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:05:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:32,909 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:32,962 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-21 17:05:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:05:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 17:05:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:32,964 INFO L225 Difference]: With dead ends: 37 [2022-11-21 17:05:32,964 INFO L226 Difference]: Without dead ends: 37 [2022-11-21 17:05:32,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:32,966 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:32,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:05:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-21 17:05:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-21 17:05:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.4) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-21 17:05:32,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2022-11-21 17:05:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:32,973 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-21 17:05:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-21 17:05:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:05:32,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:32,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:05:32,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1534887149, now seen corresponding path program 1 times [2022-11-21 17:05:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:32,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126200030] [2022-11-21 17:05:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:32,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:33,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:33,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126200030] [2022-11-21 17:05:33,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126200030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:33,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:33,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:05:33,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400181808] [2022-11-21 17:05:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:33,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:05:33,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:05:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:05:33,187 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:33,272 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-11-21 17:05:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:05:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-21 17:05:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:33,276 INFO L225 Difference]: With dead ends: 81 [2022-11-21 17:05:33,277 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 17:05:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:05:33,284 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 163 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 [2022-11-21 17:05:33,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 163 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:05:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 17:05:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2022-11-21 17:05:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-21 17:05:33,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 14 [2022-11-21 17:05:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:33,295 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-21 17:05:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-21 17:05:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:05:33,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:33,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:33,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:05:33,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2059015569, now seen corresponding path program 1 times [2022-11-21 17:05:33,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566105910] [2022-11-21 17:05:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:33,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:33,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566105910] [2022-11-21 17:05:33,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566105910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:33,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:33,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:05:33,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889266680] [2022-11-21 17:05:33,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:05:33,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:05:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:05:33,428 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:33,488 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-21 17:05:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:05:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-21 17:05:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:33,490 INFO L225 Difference]: With dead ends: 54 [2022-11-21 17:05:33,490 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 17:05:33,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:05:33,492 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 68 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 [2022-11-21 17:05:33,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 68 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:05:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 17:05:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-21 17:05:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-21 17:05:33,498 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2022-11-21 17:05:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:33,498 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-21 17:05:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-21 17:05:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:05:33,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:33,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 17:05:33,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1028076723, now seen corresponding path program 1 times [2022-11-21 17:05:33,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:33,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403205332] [2022-11-21 17:05:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:33,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403205332] [2022-11-21 17:05:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403205332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:33,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:33,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:05:33,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231202433] [2022-11-21 17:05:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 17:05:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 17:05:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:05:33,773 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:33,925 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-21 17:05:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:05:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 17:05:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:33,927 INFO L225 Difference]: With dead ends: 36 [2022-11-21 17:05:33,927 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 17:05:33,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:05:33,930 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:33,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 53 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 17:05:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-21 17:05:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-21 17:05:33,945 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 17 [2022-11-21 17:05:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:33,947 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-21 17:05:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-21 17:05:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:05:33,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:33,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:33,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 17:05:33,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1028076724, now seen corresponding path program 1 times [2022-11-21 17:05:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130917403] [2022-11-21 17:05:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:34,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130917403] [2022-11-21 17:05:34,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130917403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:34,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:34,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:05:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573652322] [2022-11-21 17:05:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:34,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:05:34,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:05:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:05:34,460 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:34,737 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-21 17:05:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:05:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 17:05:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:34,739 INFO L225 Difference]: With dead ends: 42 [2022-11-21 17:05:34,739 INFO L226 Difference]: Without dead ends: 42 [2022-11-21 17:05:34,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:05:34,740 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:34,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 73 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-21 17:05:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-11-21 17:05:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.3125) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-21 17:05:34,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 17 [2022-11-21 17:05:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:34,744 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-21 17:05:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-21 17:05:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:05:34,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:34,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:05:34,745 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1805607356, now seen corresponding path program 1 times [2022-11-21 17:05:34,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:34,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662508166] [2022-11-21 17:05:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:34,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662508166] [2022-11-21 17:05:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662508166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:35,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:35,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:05:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821890089] [2022-11-21 17:05:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:35,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:05:35,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:05:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:05:35,460 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 17:05:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:35,914 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-21 17:05:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:05:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 [2022-11-21 17:05:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:35,915 INFO L225 Difference]: With dead ends: 37 [2022-11-21 17:05:35,915 INFO L226 Difference]: Without dead ends: 37 [2022-11-21 17:05:35,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:05:35,916 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:35,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 102 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:05:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-21 17:05:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-21 17:05:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-21 17:05:35,926 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 18 [2022-11-21 17:05:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:35,926 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-21 17:05:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 17:05:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-21 17:05:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:05:35,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:35,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:35,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:05:35,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1805607357, now seen corresponding path program 1 times [2022-11-21 17:05:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:35,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518210003] [2022-11-21 17:05:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:36,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518210003] [2022-11-21 17:05:36,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518210003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:36,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:36,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 17:05:36,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778053211] [2022-11-21 17:05:36,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:36,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:05:36,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:36,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:05:36,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:05:36,694 INFO L87 Difference]: Start difference. First operand 37 states and 41 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) [2022-11-21 17:05:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:37,120 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-11-21 17:05:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:05:37,122 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 [2022-11-21 17:05:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:37,123 INFO L225 Difference]: With dead ends: 72 [2022-11-21 17:05:37,123 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 17:05:37,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:05:37,124 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 112 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:37,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 187 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:05:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 17:05:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2022-11-21 17:05:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 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) [2022-11-21 17:05:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-11-21 17:05:37,130 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 18 [2022-11-21 17:05:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:37,130 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-11-21 17:05:37,130 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) [2022-11-21 17:05:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-11-21 17:05:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:05:37,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:37,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:37,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 17:05:37,132 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 525743679, now seen corresponding path program 1 times [2022-11-21 17:05:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:37,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831149945] [2022-11-21 17:05:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:37,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831149945] [2022-11-21 17:05:37,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831149945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:37,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:37,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:05:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410494453] [2022-11-21 17:05:37,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:05:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:05:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:05:37,857 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 17:05:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:38,163 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-11-21 17:05:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:05:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 [2022-11-21 17:05:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:38,164 INFO L225 Difference]: With dead ends: 53 [2022-11-21 17:05:38,164 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 17:05:38,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:05:38,165 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:38,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 119 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 17:05:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2022-11-21 17:05:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-21 17:05:38,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2022-11-21 17:05:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:38,169 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-21 17:05:38,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 17:05:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-21 17:05:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:38,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:38,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:38,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 17:05:38,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash -943185184, now seen corresponding path program 1 times [2022-11-21 17:05:38,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:38,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855673481] [2022-11-21 17:05:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855673481] [2022-11-21 17:05:38,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855673481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:38,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:38,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:05:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589128598] [2022-11-21 17:05:38,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:38,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:05:38,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:05:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:05:38,300 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:38,398 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-21 17:05:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:05:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-21 17:05:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:38,400 INFO L225 Difference]: With dead ends: 37 [2022-11-21 17:05:38,400 INFO L226 Difference]: Without dead ends: 37 [2022-11-21 17:05:38,400 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 [2022-11-21 17:05:38,401 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:38,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 77 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:05:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-21 17:05:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-21 17:05:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-21 17:05:38,405 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 23 [2022-11-21 17:05:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:38,406 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-21 17:05:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-21 17:05:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:38,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:38,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:38,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 17:05:38,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -943185183, now seen corresponding path program 1 times [2022-11-21 17:05:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341958985] [2022-11-21 17:05:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:38,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341958985] [2022-11-21 17:05:38,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341958985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:38,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:38,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:05:38,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629621566] [2022-11-21 17:05:38,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:05:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:05:38,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:05:38,639 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:38,739 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-21 17:05:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:05:38,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-21 17:05:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:38,740 INFO L225 Difference]: With dead ends: 75 [2022-11-21 17:05:38,741 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 17:05:38,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:05:38,743 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 174 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 [2022-11-21 17:05:38,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 174 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:05:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 17:05:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2022-11-21 17:05:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-11-21 17:05:38,753 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2022-11-21 17:05:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:38,754 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-11-21 17:05:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-11-21 17:05:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:38,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:38,759 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] [2022-11-21 17:05:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 17:05:38,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -922163051, now seen corresponding path program 1 times [2022-11-21 17:05:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341330488] [2022-11-21 17:05:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:38,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341330488] [2022-11-21 17:05:38,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341330488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:38,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:38,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:05:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928720684] [2022-11-21 17:05:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:38,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:05:38,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:05:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:05:38,975 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:39,071 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-21 17:05:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:05:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-21 17:05:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:39,074 INFO L225 Difference]: With dead ends: 62 [2022-11-21 17:05:39,074 INFO L226 Difference]: Without dead ends: 62 [2022-11-21 17:05:39,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:05:39,078 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 157 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 [2022-11-21 17:05:39,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 157 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:05:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-21 17:05:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-11-21 17:05:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-21 17:05:39,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 23 [2022-11-21 17:05:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-21 17:05:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-21 17:05:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:39,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 17:05:39,095 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1760833633, now seen corresponding path program 1 times [2022-11-21 17:05:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:39,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764316407] [2022-11-21 17:05:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:40,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764316407] [2022-11-21 17:05:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764316407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:40,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:40,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 17:05:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108851630] [2022-11-21 17:05:40,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:05:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:05:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:05:40,630 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:42,028 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-21 17:05:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 17:05:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-21 17:05:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:42,030 INFO L225 Difference]: With dead ends: 64 [2022-11-21 17:05:42,031 INFO L226 Difference]: Without dead ends: 64 [2022-11-21 17:05:42,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-11-21 17:05:42,032 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:42,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 125 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:05:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-21 17:05:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-11-21 17:05:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 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) [2022-11-21 17:05:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-11-21 17:05:42,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 23 [2022-11-21 17:05:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-11-21 17:05:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-11-21 17:05:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:42,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:42,038 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] [2022-11-21 17:05:42,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 17:05:42,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1739811501, now seen corresponding path program 1 times [2022-11-21 17:05:42,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:42,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594267739] [2022-11-21 17:05:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:42,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594267739] [2022-11-21 17:05:42,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594267739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:42,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:42,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 17:05:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742290958] [2022-11-21 17:05:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:42,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:05:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:05:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:05:42,975 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:43,701 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2022-11-21 17:05:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:05:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-21 17:05:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:43,703 INFO L225 Difference]: With dead ends: 110 [2022-11-21 17:05:43,703 INFO L226 Difference]: Without dead ends: 110 [2022-11-21 17:05:43,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-11-21 17:05:43,704 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:43,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 218 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:05:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-21 17:05:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-11-21 17:05:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 92 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-11-21 17:05:43,710 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 23 [2022-11-21 17:05:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-11-21 17:05:43,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-11-21 17:05:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:05:43,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:43,712 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] [2022-11-21 17:05:43,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 17:05:43,713 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1317109675, now seen corresponding path program 1 times [2022-11-21 17:05:43,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:43,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734730649] [2022-11-21 17:05:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:44,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734730649] [2022-11-21 17:05:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734730649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303938306] [2022-11-21 17:05:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:44,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:44,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:05:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:44,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 17:05:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:44,982 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 14 treesize of output 10 [2022-11-21 17:05:45,095 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:05:45,096 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 [2022-11-21 17:05:45,369 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:05:45,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 62 [2022-11-21 17:05:45,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-11-21 17:05:45,445 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-21 17:05:46,027 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:05:46,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 48 [2022-11-21 17:05:46,073 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-21 17:05:46,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:46,469 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 54 treesize of output 51 [2022-11-21 17:05:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:46,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:47,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:47,850 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 23 treesize of output 24 [2022-11-21 17:05:47,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:47,882 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 34 [2022-11-21 17:05:47,897 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 30 treesize of output 26 [2022-11-21 17:05:47,907 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 7 [2022-11-21 17:05:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303938306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:48,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:48,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-11-21 17:05:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071604521] [2022-11-21 17:05:48,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 17:05:48,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 17:05:48,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1015, Unknown=1, NotChecked=0, Total=1122 [2022-11-21 17:05:48,074 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 34 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) [2022-11-21 17:05:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:51,040 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-11-21 17:05:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 17:05:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 34 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) Word has length 23 [2022-11-21 17:05:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:51,042 INFO L225 Difference]: With dead ends: 105 [2022-11-21 17:05:51,043 INFO L226 Difference]: Without dead ends: 105 [2022-11-21 17:05:51,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=284, Invalid=1785, Unknown=1, NotChecked=0, Total=2070 [2022-11-21 17:05:51,044 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 243 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:51,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 249 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:05:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-21 17:05:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-11-21 17:05:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 96 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) [2022-11-21 17:05:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-11-21 17:05:51,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 23 [2022-11-21 17:05:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:51,049 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-11-21 17:05:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 34 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) [2022-11-21 17:05:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-11-21 17:05:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 17:05:51,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:51,051 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] [2022-11-21 17:05:51,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:51,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 17:05:51,253 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:05:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:51,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2119273020, now seen corresponding path program 1 times [2022-11-21 17:05:51,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329524368] [2022-11-21 17:05:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:51,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329524368] [2022-11-21 17:05:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329524368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132833656] [2022-11-21 17:05:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:52,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:52,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:52,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:05:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 17:05:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:53,254 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 [2022-11-21 17:05:53,270 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:05:53,270 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 [2022-11-21 17:05:53,400 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:05:53,400 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 [2022-11-21 17:05:53,438 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:05:53,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 17:05:53,533 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 [2022-11-21 17:05:53,546 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 [2022-11-21 17:05:53,785 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 [2022-11-21 17:05:53,798 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 [2022-11-21 17:05:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:54,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:05:56,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:05:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:56,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132833656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:56,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:56,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 40 [2022-11-21 17:05:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251255293] [2022-11-21 17:05:56,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:56,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 17:05:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 17:05:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 17:05:56,101 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 41 states, 40 states have (on average 1.75) internal successors, (70), 41 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) [2022-11-21 17:06:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:06:00,916 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-11-21 17:06:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 41 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) Word has length 24 [2022-11-21 17:06:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:06:00,918 INFO L225 Difference]: With dead ends: 101 [2022-11-21 17:06:00,918 INFO L226 Difference]: Without dead ends: 101 [2022-11-21 17:06:00,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 17:06:00,920 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 323 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:06:00,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 285 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 17:06:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-21 17:06:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-11-21 17:06:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-11-21 17:06:00,924 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 24 [2022-11-21 17:06:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:06:00,924 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-11-21 17:06:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 41 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) [2022-11-21 17:06:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-11-21 17:06:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:06:00,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:06:00,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:00,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 17:06:01,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:01,133 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:06:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1053639639, now seen corresponding path program 1 times [2022-11-21 17:06:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289821144] [2022-11-21 17:06:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:01,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:01,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289821144] [2022-11-21 17:06:01,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289821144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:01,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:01,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:06:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372512411] [2022-11-21 17:06:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:06:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:06:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:06:01,614 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:06:01,692 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-21 17:06:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:06:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-21 17:06:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:06:01,694 INFO L225 Difference]: With dead ends: 97 [2022-11-21 17:06:01,694 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 17:06:01,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:06:01,695 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:06:01,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:06:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 17:06:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-21 17:06:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 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) [2022-11-21 17:06:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-11-21 17:06:01,698 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 25 [2022-11-21 17:06:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:06:01,698 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-11-21 17:06:01,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-11-21 17:06:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 17:06:01,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:06:01,700 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] [2022-11-21 17:06:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 17:06:01,701 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:06:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2024796265, now seen corresponding path program 1 times [2022-11-21 17:06:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:01,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509059933] [2022-11-21 17:06:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509059933] [2022-11-21 17:06:03,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509059933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777948020] [2022-11-21 17:06:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:03,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:03,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:03,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:06:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:03,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-21 17:06:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:03,658 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-21 17:06:03,658 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 [2022-11-21 17:06:03,689 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:06:03,690 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 [2022-11-21 17:06:03,896 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:06:03,896 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 [2022-11-21 17:06:03,929 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 17:06:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:06:04,025 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 11 treesize of output 7 [2022-11-21 17:06:04,033 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 [2022-11-21 17:06:04,309 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 [2022-11-21 17:06:04,323 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 [2022-11-21 17:06:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:05,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:06:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:06:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:07,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777948020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:07,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:07,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 45 [2022-11-21 17:06:07,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745907100] [2022-11-21 17:06:07,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:07,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 17:06:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 17:06:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 17:06:07,528 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 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) [2022-11-21 17:06:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:06:16,168 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-11-21 17:06:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 17:06:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 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) Word has length 27 [2022-11-21 17:06:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:06:16,170 INFO L225 Difference]: With dead ends: 78 [2022-11-21 17:06:16,170 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 17:06:16,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=794, Invalid=4608, Unknown=0, NotChecked=0, Total=5402 [2022-11-21 17:06:16,173 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 514 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:06:16,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 226 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 17:06:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 17:06:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-21 17:06:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 74 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) [2022-11-21 17:06:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-21 17:06:16,177 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 27 [2022-11-21 17:06:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:06:16,177 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-21 17:06:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 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) [2022-11-21 17:06:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-21 17:06:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 17:06:16,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:06:16,179 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] [2022-11-21 17:06:16,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 17:06:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 17:06:16,387 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:06:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1360629310, now seen corresponding path program 1 times [2022-11-21 17:06:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:16,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181673782] [2022-11-21 17:06:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:17,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181673782] [2022-11-21 17:06:17,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181673782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894205262] [2022-11-21 17:06:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:17,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:17,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:17,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:06:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-21 17:06:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:18,140 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 [2022-11-21 17:06:18,147 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 [2022-11-21 17:06:18,258 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:06:18,259 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 [2022-11-21 17:06:18,364 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 [2022-11-21 17:06:18,380 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 [2022-11-21 17:06:18,631 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 [2022-11-21 17:06:18,640 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 [2022-11-21 17:06:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:23,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:06:23,293 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-21 17:06:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:23,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894205262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:23,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:23,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 44 [2022-11-21 17:06:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310400813] [2022-11-21 17:06:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 17:06:23,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 17:06:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 17:06:23,301 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 45 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 45 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) [2022-11-21 17:07:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:07:28,550 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-11-21 17:07:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 17:07:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 45 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 [2022-11-21 17:07:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:07:28,552 INFO L225 Difference]: With dead ends: 102 [2022-11-21 17:07:28,553 INFO L226 Difference]: Without dead ends: 102 [2022-11-21 17:07:28,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=750, Invalid=5102, Unknown=0, NotChecked=0, Total=5852 [2022-11-21 17:07:28,556 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 439 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:07:28,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 248 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 17:07:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-21 17:07:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2022-11-21 17:07:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-11-21 17:07:28,561 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 29 [2022-11-21 17:07:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:07:28,561 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-11-21 17:07:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 45 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) [2022-11-21 17:07:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-11-21 17:07:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 17:07:28,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:07:28,562 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] [2022-11-21 17:07:28,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:28,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 17:07:28,770 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:07:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1339607178, now seen corresponding path program 2 times [2022-11-21 17:07:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:28,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100804623] [2022-11-21 17:07:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:30,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100804623] [2022-11-21 17:07:30,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100804623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537276798] [2022-11-21 17:07:30,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:07:30,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:30,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:30,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:30,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:07:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:07:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:07:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-21 17:07:30,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:30,713 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 [2022-11-21 17:07:30,769 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 [2022-11-21 17:07:30,856 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:07:30,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 17:07:30,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 17:07:30,972 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 [2022-11-21 17:07:30,983 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 [2022-11-21 17:07:31,220 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 [2022-11-21 17:07:31,450 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 [2022-11-21 17:07:31,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-21 17:07:32,349 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-21 17:07:32,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-21 17:07:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:36,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:36,872 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 48 treesize of output 37 [2022-11-21 17:07:36,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:07:36,906 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-21 17:07:36,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-11-21 17:07:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:07:36,933 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 16 treesize of output 12 [2022-11-21 17:07:36,942 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 7 [2022-11-21 17:07:36,989 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 17:07:36,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 17:07:37,090 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 [2022-11-21 17:07:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537276798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:37,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:37,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-11-21 17:07:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351391419] [2022-11-21 17:07:37,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:37,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 17:07:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 17:07:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2206, Unknown=5, NotChecked=0, Total=2352 [2022-11-21 17:07:37,150 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 49 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:07:44,926 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-11-21 17:07:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 17:07:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2022-11-21 17:07:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:07:44,928 INFO L225 Difference]: With dead ends: 98 [2022-11-21 17:07:44,928 INFO L226 Difference]: Without dead ends: 98 [2022-11-21 17:07:44,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=471, Invalid=4080, Unknown=5, NotChecked=0, Total=4556 [2022-11-21 17:07:44,930 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:07:44,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 452 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 795 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 17:07:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-21 17:07:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-11-21 17:07:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-11-21 17:07:44,934 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 29 [2022-11-21 17:07:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:07:44,935 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-11-21 17:07:44,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-11-21 17:07:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:07:44,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:07:44,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:07:44,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:45,143 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:07:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1421850427, now seen corresponding path program 2 times [2022-11-21 17:07:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571222935] [2022-11-21 17:07:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:46,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571222935] [2022-11-21 17:07:46,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571222935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:46,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963922095] [2022-11-21 17:07:46,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:07:46,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:46,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:46,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:46,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:07:46,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:07:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:07:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 17:07:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:46,822 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-21 17:07:46,823 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 [2022-11-21 17:07:46,849 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:07:46,850 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 [2022-11-21 17:07:47,083 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 17:07:47,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:07:47,095 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 [2022-11-21 17:07:47,178 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 [2022-11-21 17:07:47,187 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 [2022-11-21 17:07:47,383 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 [2022-11-21 17:07:47,390 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 [2022-11-21 17:07:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:48,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:50,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:07:50,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:07:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:50,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963922095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:50,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:50,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 48 [2022-11-21 17:07:50,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141415602] [2022-11-21 17:07:50,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:50,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 17:07:50,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 17:07:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 17:07:50,240 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 49 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 49 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) [2022-11-21 17:07:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:07:56,844 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-11-21 17:07:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 17:07:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 49 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) Word has length 30 [2022-11-21 17:07:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:07:56,845 INFO L225 Difference]: With dead ends: 101 [2022-11-21 17:07:56,846 INFO L226 Difference]: Without dead ends: 101 [2022-11-21 17:07:56,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=889, Invalid=5591, Unknown=0, NotChecked=0, Total=6480 [2022-11-21 17:07:56,849 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 281 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:07:56,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 235 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 17:07:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-21 17:07:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2022-11-21 17:07:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 89 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) [2022-11-21 17:07:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-11-21 17:07:56,853 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 30 [2022-11-21 17:07:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:07:56,853 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-11-21 17:07:56,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 49 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) [2022-11-21 17:07:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-11-21 17:07:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 17:07:56,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:07:56,855 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:07:56,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:57,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:57,063 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:07:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1993888215, now seen corresponding path program 3 times [2022-11-21 17:07:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:57,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280167485] [2022-11-21 17:07:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:58,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280167485] [2022-11-21 17:07:58,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280167485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:58,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819807054] [2022-11-21 17:07:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:07:58,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:58,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:58,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:07:59,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 17:07:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:07:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-21 17:07:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:59,353 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 [2022-11-21 17:07:59,360 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 [2022-11-21 17:07:59,406 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 [2022-11-21 17:07:59,529 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:07:59,530 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 [2022-11-21 17:07:59,604 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:07:59,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 17:07:59,733 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 [2022-11-21 17:07:59,742 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 [2022-11-21 17:07:59,973 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 [2022-11-21 17:08:00,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-21 17:08:00,628 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 24 treesize of output 24 [2022-11-21 17:08:01,396 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 32 treesize of output 30 [2022-11-21 17:08:04,251 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-21 17:08:04,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2022-11-21 17:08:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:08:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:08:17,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:08:17,442 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 72 treesize of output 50 [2022-11-21 17:08:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:08:17,542 INFO L321 Elim1Store]: treesize reduction 5, result has 92.1 percent of original size [2022-11-21 17:08:17,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 101 [2022-11-21 17:08:17,568 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 7 [2022-11-21 17:08:17,602 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 17:08:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 17:08:17,623 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 9 treesize of output 7 [2022-11-21 17:08:18,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:08:18,654 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 [2022-11-21 17:08:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:08:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819807054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:08:18,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:08:18,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 22] total 60 [2022-11-21 17:08:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204327407] [2022-11-21 17:08:18,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:08:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 17:08:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:08:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 17:08:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3417, Unknown=43, NotChecked=0, Total=3660 [2022-11-21 17:08:18,706 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 61 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 61 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) [2022-11-21 17:08:32,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:34,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:36,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:46,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:53,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:55,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:59,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:01,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:09:02,617 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-11-21 17:09:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:09:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 61 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 35 [2022-11-21 17:09:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:09:02,619 INFO L225 Difference]: With dead ends: 109 [2022-11-21 17:09:02,619 INFO L226 Difference]: Without dead ends: 109 [2022-11-21 17:09:02,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=776, Invalid=6487, Unknown=47, NotChecked=0, Total=7310 [2022-11-21 17:09:02,621 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 233 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 65 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:09:02,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 606 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1172 Invalid, 7 Unknown, 0 Unchecked, 19.7s Time] [2022-11-21 17:09:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-21 17:09:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2022-11-21 17:09:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:09:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-21 17:09:02,625 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 35 [2022-11-21 17:09:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:09:02,626 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-21 17:09:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 61 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) [2022-11-21 17:09:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-21 17:09:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 17:09:02,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:09:02,627 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 17:09:02,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:09:02,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 17:09:02,832 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:09:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:09:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1819763378, now seen corresponding path program 1 times [2022-11-21 17:09:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:09:02,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354969735] [2022-11-21 17:09:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:09:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:09:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:09:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:09:04,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:09:04,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354969735] [2022-11-21 17:09:04,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354969735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:09:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841897485] [2022-11-21 17:09:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:09:04,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:09:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:09:04,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:09:04,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:09:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:09:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-21 17:09:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:09:05,121 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 [2022-11-21 17:09:05,129 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 [2022-11-21 17:09:05,273 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:09:05,273 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 [2022-11-21 17:09:05,399 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 [2022-11-21 17:09:05,427 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 [2022-11-21 17:09:05,747 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 [2022-11-21 17:09:05,755 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 [2022-11-21 17:09:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:09:08,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:09:12,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:09:12,885 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-21 17:09:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:09:12,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841897485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:09:12,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:09:12,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 55 [2022-11-21 17:09:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691602948] [2022-11-21 17:09:12,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:09:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 17:09:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:09:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 17:09:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2855, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 17:09:12,893 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 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) [2022-11-21 17:11:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:11:11,763 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-11-21 17:11:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 17:11:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 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) Word has length 37 [2022-11-21 17:11:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:11:11,765 INFO L225 Difference]: With dead ends: 130 [2022-11-21 17:11:11,765 INFO L226 Difference]: Without dead ends: 130 [2022-11-21 17:11:11,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 122.1s TimeCoverageRelationStatistics Valid=1198, Invalid=10358, Unknown=0, NotChecked=0, Total=11556 [2022-11-21 17:11:11,769 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 633 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:11:11,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 431 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 17:11:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-21 17:11:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2022-11-21 17:11:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0841121495327102) internal successors, (116), 108 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) [2022-11-21 17:11:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-11-21 17:11:11,774 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 37 [2022-11-21 17:11:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:11:11,775 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-11-21 17:11:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 56 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) [2022-11-21 17:11:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-11-21 17:11:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 17:11:11,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:11:11,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:11,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:11,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 17:11:11,985 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:11:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 186793788, now seen corresponding path program 2 times [2022-11-21 17:11:11,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664507645] [2022-11-21 17:11:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:11,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664507645] [2022-11-21 17:11:14,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664507645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:11:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160014059] [2022-11-21 17:11:14,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:11:14,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:14,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:14,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:11:14,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:11:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:11:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-21 17:11:14,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:14,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:11:14,897 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 [2022-11-21 17:11:14,913 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:11:14,913 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 [2022-11-21 17:11:15,053 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 17:11:15,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 17:11:15,077 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 [2022-11-21 17:11:15,178 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 [2022-11-21 17:11:15,188 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 [2022-11-21 17:11:15,463 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 36 treesize of output 20 [2022-11-21 17:11:15,473 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 [2022-11-21 17:11:17,043 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 5 treesize of output 3 [2022-11-21 17:11:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:17,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:21,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:11:21,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:11:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:21,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160014059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:21,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:21,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 65 [2022-11-21 17:11:21,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051782824] [2022-11-21 17:11:21,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:21,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-21 17:11:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-21 17:11:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3942, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 17:11:21,737 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 66 states, 65 states have (on average 2.0) internal successors, (130), 66 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) [2022-11-21 17:11:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:11:36,855 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-11-21 17:11:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 17:11:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.0) internal successors, (130), 66 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) Word has length 45 [2022-11-21 17:11:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:11:36,857 INFO L225 Difference]: With dead ends: 128 [2022-11-21 17:11:36,857 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 17:11:36,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1554, Invalid=11786, Unknown=0, NotChecked=0, Total=13340 [2022-11-21 17:11:36,860 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 832 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:11:36,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 483 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 17:11:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 17:11:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-21 17:11:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:11:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-11-21 17:11:36,863 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 45 [2022-11-21 17:11:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:11:36,864 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-11-21 17:11:36,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.0) internal successors, (130), 66 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) [2022-11-21 17:11:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-11-21 17:11:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 17:11:36,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:11:36,865 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:36,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-21 17:11:37,074 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:11:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 340339365, now seen corresponding path program 2 times [2022-11-21 17:11:37,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848529832] [2022-11-21 17:11:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:39,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848529832] [2022-11-21 17:11:39,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848529832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:11:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47688958] [2022-11-21 17:11:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:11:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:39,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:39,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:11:39,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:11:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:11:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-21 17:11:39,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:40,079 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-21 17:11:40,079 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 [2022-11-21 17:11:40,104 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:11:40,104 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 [2022-11-21 17:11:40,383 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 17:11:40,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:11:40,399 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 [2022-11-21 17:11:40,509 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 [2022-11-21 17:11:40,523 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 [2022-11-21 17:11:40,799 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 [2022-11-21 17:11:40,806 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 [2022-11-21 17:11:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:42,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:11:46,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:11:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47688958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:46,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 61 [2022-11-21 17:11:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758145561] [2022-11-21 17:11:46,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:46,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 17:11:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 17:11:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 17:11:46,033 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 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) [2022-11-21 17:12:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:01,735 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-11-21 17:12:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 17:12:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 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) Word has length 47 [2022-11-21 17:12:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:01,737 INFO L225 Difference]: With dead ends: 114 [2022-11-21 17:12:01,737 INFO L226 Difference]: Without dead ends: 90 [2022-11-21 17:12:01,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3087 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1659, Invalid=11913, Unknown=0, NotChecked=0, Total=13572 [2022-11-21 17:12:01,740 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:01,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 323 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-21 17:12:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-21 17:12:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-11-21 17:12:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 84 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) [2022-11-21 17:12:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2022-11-21 17:12:01,743 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 47 [2022-11-21 17:12:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:01,744 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2022-11-21 17:12:01,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 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) [2022-11-21 17:12:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2022-11-21 17:12:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 17:12:01,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:01,745 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:01,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 17:12:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 17:12:01,953 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:12:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1682695496, now seen corresponding path program 3 times [2022-11-21 17:12:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:01,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214183574] [2022-11-21 17:12:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:04,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214183574] [2022-11-21 17:12:04,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214183574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278059741] [2022-11-21 17:12:04,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:12:04,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:04,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:12:05,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 17:12:05,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:12:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-21 17:12:05,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:05,556 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-21 17:12:05,557 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 [2022-11-21 17:12:05,584 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:12:05,584 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 [2022-11-21 17:12:05,820 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 17:12:05,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:12:05,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 17:12:05,951 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 [2022-11-21 17:12:05,963 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 [2022-11-21 17:12:06,260 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 [2022-11-21 17:12:06,268 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 [2022-11-21 17:12:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:08,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:12:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:12:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:12:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278059741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:12:11,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:12:11,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 21] total 65 [2022-11-21 17:12:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817070338] [2022-11-21 17:12:11,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:12:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-21 17:12:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-21 17:12:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=3976, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 17:12:11,787 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:12:27,398 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-21 17:12:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 17:12:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 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 [2022-11-21 17:12:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:12:27,399 INFO L225 Difference]: With dead ends: 91 [2022-11-21 17:12:27,399 INFO L226 Difference]: Without dead ends: 91 [2022-11-21 17:12:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1570, Invalid=11540, Unknown=0, NotChecked=0, Total=13110 [2022-11-21 17:12:27,402 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 606 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:12:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 309 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 17:12:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-21 17:12:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-11-21 17:12:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 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) [2022-11-21 17:12:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-11-21 17:12:27,406 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 48 [2022-11-21 17:12:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:12:27,407 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-11-21 17:12:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-11-21 17:12:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-21 17:12:27,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:12:27,408 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:27,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 17:12:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 17:12:27,619 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:12:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1673122859, now seen corresponding path program 3 times [2022-11-21 17:12:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923415246] [2022-11-21 17:12:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:36,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923415246] [2022-11-21 17:12:36,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923415246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086316954] [2022-11-21 17:12:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:12:36,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:36,717 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:36,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 17:12:48,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 17:12:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:12:48,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 171 conjunts are in the unsatisfiable core [2022-11-21 17:12:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:48,590 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 [2022-11-21 17:12:48,596 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 [2022-11-21 17:12:48,769 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:12:48,769 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 [2022-11-21 17:12:48,940 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 [2022-11-21 17:12:48,962 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 [2022-11-21 17:12:49,355 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 [2022-11-21 17:12:49,365 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 [2022-11-21 17:12:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:56,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:13:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:06,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086316954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:13:06,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:13:06,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 31, 31] total 105 [2022-11-21 17:13:06,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634552804] [2022-11-21 17:13:06,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:13:06,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-21 17:13:06,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-21 17:13:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=10686, Unknown=0, NotChecked=0, Total=11130 [2022-11-21 17:13:06,577 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 106 states, 105 states have (on average 2.323809523809524) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:18:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:18:27,216 INFO L93 Difference]: Finished difference Result 227 states and 228 transitions. [2022-11-21 17:18:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-11-21 17:18:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 2.323809523809524) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 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 83 [2022-11-21 17:18:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:18:27,218 INFO L225 Difference]: With dead ends: 227 [2022-11-21 17:18:27,218 INFO L226 Difference]: Without dead ends: 175 [2022-11-21 17:18:27,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12435 ImplicationChecksByTransitivity, 329.2s TimeCoverageRelationStatistics Valid=4938, Invalid=57312, Unknown=0, NotChecked=0, Total=62250 [2022-11-21 17:18:27,224 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1948 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 4482 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 4482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:18:27,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 1102 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 4482 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-21 17:18:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-21 17:18:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2022-11-21 17:18:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0869565217391304) internal successors, (175), 162 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:18:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 175 transitions. [2022-11-21 17:18:27,229 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 175 transitions. Word has length 83 [2022-11-21 17:18:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:18:27,230 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 175 transitions. [2022-11-21 17:18:27,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 2.323809523809524) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:18:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 175 transitions. [2022-11-21 17:18:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-21 17:18:27,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:18:27,231 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:18:27,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-21 17:18:27,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:18:27,452 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-21 17:18:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:18:27,452 INFO L85 PathProgramCache]: Analyzing trace with hash 978887154, now seen corresponding path program 4 times [2022-11-21 17:18:27,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:18:27,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133517305] [2022-11-21 17:18:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:18:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:18:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:18:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 236 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:18:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:18:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133517305] [2022-11-21 17:18:30,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133517305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:18:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196903765] [2022-11-21 17:18:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:18:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:18:30,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:18:30,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:18:30,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b89fadc-b415-4e50-be65-11fcb780d828/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 17:18:32,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:18:32,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:18:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 239 conjunts are in the unsatisfiable core [2022-11-21 17:18:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:18:32,190 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-21 17:18:32,191 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 [2022-11-21 17:18:32,337 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:18:32,338 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 [2022-11-21 17:18:32,463 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 [2022-11-21 17:18:32,477 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 [2022-11-21 17:18:32,763 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 34 treesize of output 18 [2022-11-21 17:18:32,770 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 [2022-11-21 17:18:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:18:40,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:18:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:18:50,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196903765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:18:50,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:18:50,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 34] total 103 [2022-11-21 17:18:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634342307] [2022-11-21 17:18:50,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:18:50,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-21 17:18:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:18:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-21 17:18:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=10000, Unknown=0, NotChecked=0, Total=10712 [2022-11-21 17:18:50,227 INFO L87 Difference]: Start difference. First operand 163 states and 175 transitions. Second operand has 104 states, 103 states have (on average 2.3980582524271843) internal successors, (247), 104 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)