./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- 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-8393723 [2022-11-18 19:57:18,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:57:18,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:57:18,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:57:18,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:57:18,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:57:18,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:57:18,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:57:18,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:57:18,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:57:18,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:57:18,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:57:18,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:57:18,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:57:18,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:57:18,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:57:18,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:57:18,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:57:18,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:57:18,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:57:18,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:57:18,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:57:18,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:57:18,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:57:18,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:57:18,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:57:18,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:57:18,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:57:18,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:57:18,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:57:18,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:57:18,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:57:18,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:57:18,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:57:18,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:57:18,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:57:18,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:57:18,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:57:18,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:57:18,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:57:18,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:57:18,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:57:18,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:57:18,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:57:18,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:57:18,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:57:18,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:57:18,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:57:18,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:57:18,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:57:18,521 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:57:18,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:57:18,522 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:57:18,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:57:18,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:57:18,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:57:18,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:57:18,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:57:18,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:57:18,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:57:18,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:57:18,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:57:18,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:57:18,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:57:18,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:57:18,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:57:18,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:57:18,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:57:18,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:57:18,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:57:18,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:57:18,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:57:18,527 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:57:18,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:57:18,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:57:18,528 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_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2022-11-18 19:57:18,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:57:18,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:57:18,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:57:18,831 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:57:18,832 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:57:18,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2022-11-18 19:57:18,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/data/46ddd36a7/7bd8552d1dc54ef2ad380989eda84346/FLAGa7a7f6246 [2022-11-18 19:57:19,371 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:57:19,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2022-11-18 19:57:19,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/data/46ddd36a7/7bd8552d1dc54ef2ad380989eda84346/FLAGa7a7f6246 [2022-11-18 19:57:19,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/data/46ddd36a7/7bd8552d1dc54ef2ad380989eda84346 [2022-11-18 19:57:19,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:57:19,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:57:19,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:57:19,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:57:19,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:57:19,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:57:19" (1/1) ... [2022-11-18 19:57:19,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2112ff04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:19, skipping insertion in model container [2022-11-18 19:57:19,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:57:19" (1/1) ... [2022-11-18 19:57:19,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:57:19,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:57:20,113 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2022-11-18 19:57:20,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:57:20,125 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:57:20,163 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2022-11-18 19:57:20,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:57:20,187 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:57:20,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20 WrapperNode [2022-11-18 19:57:20,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:57:20,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:57:20,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:57:20,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:57:20,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,253 INFO L138 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2022-11-18 19:57:20,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:57:20,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:57:20,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:57:20,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:57:20,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:57:20,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:57:20,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:57:20,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:57:20,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (1/1) ... [2022-11-18 19:57:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:57:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:20,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:57:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:57:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:57:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:57:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:57:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:57:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:57:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:57:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:57:20,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:57:20,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:57:20,503 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:57:20,746 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:57:20,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:57:20,762 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 19:57:20,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:57:20 BoogieIcfgContainer [2022-11-18 19:57:20,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:57:20,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:57:20,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:57:20,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:57:20,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:57:19" (1/3) ... [2022-11-18 19:57:20,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa7beab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:57:20, skipping insertion in model container [2022-11-18 19:57:20,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:20" (2/3) ... [2022-11-18 19:57:20,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa7beab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:57:20, skipping insertion in model container [2022-11-18 19:57:20,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:57:20" (3/3) ... [2022-11-18 19:57:20,775 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2022-11-18 19:57:20,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:57:20,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:57:20,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:57:20,857 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@708a3caf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:57:20,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:57:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:57:20,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:20,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:20,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2022-11-18 19:57:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:20,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257226554] [2022-11-18 19:57:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:20,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257226554] [2022-11-18 19:57:21,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257226554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:21,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:21,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:57:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590099642] [2022-11-18 19:57:21,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:21,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:57:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:57:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:57:21,075 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:21,091 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-11-18 19:57:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:57:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:57:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:21,101 INFO L225 Difference]: With dead ends: 41 [2022-11-18 19:57:21,102 INFO L226 Difference]: Without dead ends: 17 [2022-11-18 19:57:21,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:57:21,109 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:21,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-18 19:57:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-18 19:57:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-18 19:57:21,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-11-18 19:57:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:21,144 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-18 19:57:21,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-18 19:57:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:57:21,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:21,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:57:21,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2022-11-18 19:57:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061852484] [2022-11-18 19:57:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061852484] [2022-11-18 19:57:21,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061852484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:21,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:21,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:57:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490627921] [2022-11-18 19:57:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:21,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:57:21,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:57:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:57:21,332 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-18 19:57:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:21,397 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-18 19:57:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:57:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 [2022-11-18 19:57:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:21,399 INFO L225 Difference]: With dead ends: 43 [2022-11-18 19:57:21,399 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 19:57:21,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:57:21,401 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:21,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 19:57:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2022-11-18 19:57:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-18 19:57:21,413 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2022-11-18 19:57:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:21,413 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-18 19:57:21,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-18 19:57:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-18 19:57:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 19:57:21,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:21,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:57:21,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2022-11-18 19:57:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037320711] [2022-11-18 19:57:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037320711] [2022-11-18 19:57:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037320711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489844455] [2022-11-18 19:57:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:21,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:21,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:57:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:57:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489844455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:21,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:21,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-18 19:57:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583571429] [2022-11-18 19:57:21,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:57:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:57:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:57:21,915 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) 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) [2022-11-18 19:57:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:22,055 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-11-18 19:57:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:57:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) 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 17 [2022-11-18 19:57:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:22,058 INFO L225 Difference]: With dead ends: 48 [2022-11-18 19:57:22,060 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 19:57:22,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:57:22,062 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:22,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 19:57:22,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-11-18 19:57:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-18 19:57:22,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-11-18 19:57:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:22,074 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-18 19:57:22,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) 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) [2022-11-18 19:57:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-18 19:57:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 19:57:22,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:22,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:22,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:22,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -485609004, now seen corresponding path program 2 times [2022-11-18 19:57:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:22,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755061240] [2022-11-18 19:57:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:22,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:57:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:22,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755061240] [2022-11-18 19:57:22,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755061240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:22,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:22,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:57:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176084078] [2022-11-18 19:57:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:57:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:57:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:57:22,495 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:22,576 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-18 19:57:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:57:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-11-18 19:57:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:22,577 INFO L225 Difference]: With dead ends: 27 [2022-11-18 19:57:22,578 INFO L226 Difference]: Without dead ends: 22 [2022-11-18 19:57:22,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:57:22,581 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 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 [2022-11-18 19:57:22,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-18 19:57:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-18 19:57:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2022-11-18 19:57:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-18 19:57:22,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 20 [2022-11-18 19:57:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-18 19:57:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-18 19:57:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 19:57:22,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:22,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:57:22,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 1 times [2022-11-18 19:57:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451405407] [2022-11-18 19:57:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:22,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451405407] [2022-11-18 19:57:22,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451405407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:22,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038015870] [2022-11-18 19:57:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:22,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:22,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:22,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:57:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 19:57:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:23,205 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 [2022-11-18 19:57:23,305 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 16 treesize of output 8 [2022-11-18 19:57:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:23,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:23,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038015870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:23,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:23,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2022-11-18 19:57:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206884922] [2022-11-18 19:57:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:23,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:57:23,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:57:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:57:23,367 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:23,550 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-18 19:57:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:57:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 21 [2022-11-18 19:57:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:23,554 INFO L225 Difference]: With dead ends: 30 [2022-11-18 19:57:23,554 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 19:57:23,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:57:23,557 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 100 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 19:57:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-11-18 19:57:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-18 19:57:23,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2022-11-18 19:57:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:23,571 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-18 19:57:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-18 19:57:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 19:57:23,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:23,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:23,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:57:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:23,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1160848428, now seen corresponding path program 2 times [2022-11-18 19:57:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:23,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639272780] [2022-11-18 19:57:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:57:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639272780] [2022-11-18 19:57:23,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639272780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829003446] [2022-11-18 19:57:23,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:23,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:23,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:23,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:57:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:57:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:57:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:57:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829003446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:24,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-18 19:57:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674125609] [2022-11-18 19:57:24,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:24,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:57:24,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:57:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:57:24,268 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:24,374 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-18 19:57:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:57:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 22 [2022-11-18 19:57:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:24,378 INFO L225 Difference]: With dead ends: 50 [2022-11-18 19:57:24,379 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 19:57:24,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:57:24,380 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:24,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 19:57:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-18 19:57:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-18 19:57:24,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2022-11-18 19:57:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-18 19:57:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-18 19:57:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:57:24,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:24,407 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:24,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:57:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:24,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1574908636, now seen corresponding path program 3 times [2022-11-18 19:57:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:24,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996698882] [2022-11-18 19:57:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996698882] [2022-11-18 19:57:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996698882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457061270] [2022-11-18 19:57:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:57:25,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:25,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:57:25,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:57:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 19:57:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:25,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:57:25,485 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 [2022-11-18 19:57:25,492 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 [2022-11-18 19:57:25,549 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:25,549 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 [2022-11-18 19:57:25,640 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 19 treesize of output 18 [2022-11-18 19:57:25,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 19:57:25,899 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-18 19:57:25,903 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2022-11-18 19:57:25,917 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:57:25,917 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-18 19:57:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:25,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:28,057 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0))))) is different from false [2022-11-18 19:57:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-18 19:57:28,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457061270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:28,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:28,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-18 19:57:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587507228] [2022-11-18 19:57:28,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:57:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:57:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2022-11-18 19:57:28,374 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2022-11-18 19:57:30,438 WARN L837 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0)) is different from false [2022-11-18 19:57:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:30,793 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-11-18 19:57:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:57:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) Word has length 23 [2022-11-18 19:57:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:30,797 INFO L225 Difference]: With dead ends: 63 [2022-11-18 19:57:30,797 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 19:57:30,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=78, Invalid=434, Unknown=2, NotChecked=86, Total=600 [2022-11-18 19:57:30,799 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:30,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 193 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-18 19:57:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 19:57:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-11-18 19:57:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 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) [2022-11-18 19:57:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-18 19:57:30,812 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2022-11-18 19:57:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:30,813 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-18 19:57:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2022-11-18 19:57:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-18 19:57:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:57:30,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:30,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:30,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 19:57:31,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2090698365, now seen corresponding path program 1 times [2022-11-18 19:57:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127343144] [2022-11-18 19:57:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127343144] [2022-11-18 19:57:31,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127343144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836741080] [2022-11-18 19:57:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:31,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:31,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:57:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:57:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:31,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836741080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:31,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:31,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-18 19:57:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51058591] [2022-11-18 19:57:31,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:31,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:57:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:57:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:57:31,400 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:31,533 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-11-18 19:57:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:57:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-18 19:57:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:31,535 INFO L225 Difference]: With dead ends: 61 [2022-11-18 19:57:31,535 INFO L226 Difference]: Without dead ends: 51 [2022-11-18 19:57:31,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:57:31,536 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:31,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 123 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:57:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-18 19:57:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-11-18 19:57:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-18 19:57:31,557 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25 [2022-11-18 19:57:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:31,559 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-18 19:57:31,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-18 19:57:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 19:57:31,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:31,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:31,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 19:57:31,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2022-11-18 19:57:31,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096170419] [2022-11-18 19:57:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:31,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:57:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096170419] [2022-11-18 19:57:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096170419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130014103] [2022-11-18 19:57:31,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:57:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:31,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:31,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:57:31,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:57:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:57:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:57:31,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:31,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130014103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:31,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:57:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-18 19:57:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976179047] [2022-11-18 19:57:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:32,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:57:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:57:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:57:32,005 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:32,069 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-18 19:57:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:57:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 19:57:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:32,070 INFO L225 Difference]: With dead ends: 51 [2022-11-18 19:57:32,070 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 19:57:32,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:57:32,073 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 19:57:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-18 19:57:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-18 19:57:32,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2022-11-18 19:57:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:32,090 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-18 19:57:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-18 19:57:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 19:57:32,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:32,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:32,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:32,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash -517577932, now seen corresponding path program 2 times [2022-11-18 19:57:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:32,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153077427] [2022-11-18 19:57:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:32,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153077427] [2022-11-18 19:57:32,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153077427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:32,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224520723] [2022-11-18 19:57:32,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:32,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:32,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:32,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:57:32,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:32,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:57:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:32,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:57:32,895 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 [2022-11-18 19:57:32,946 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:57:32,947 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 [2022-11-18 19:57:32,999 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 [2022-11-18 19:57:33,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 19:57:33,153 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 [2022-11-18 19:57:33,209 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:57:33,210 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-11-18 19:57:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:33,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:35,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224520723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:35,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:35,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-18 19:57:35,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160502468] [2022-11-18 19:57:35,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:57:35,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:57:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=405, Unknown=1, NotChecked=0, Total=462 [2022-11-18 19:57:35,477 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:36,125 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-18 19:57:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:57:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-18 19:57:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:36,127 INFO L225 Difference]: With dead ends: 37 [2022-11-18 19:57:36,127 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 19:57:36,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=197, Invalid=732, Unknown=1, NotChecked=0, Total=930 [2022-11-18 19:57:36,128 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:36,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 203 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:57:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 19:57:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-11-18 19:57:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-18 19:57:36,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2022-11-18 19:57:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:36,142 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-18 19:57:36,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-18 19:57:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:57:36,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:36,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:36,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 19:57:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:57:36,349 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1186607556, now seen corresponding path program 3 times [2022-11-18 19:57:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:36,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395209703] [2022-11-18 19:57:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:36,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:57:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395209703] [2022-11-18 19:57:36,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395209703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109582412] [2022-11-18 19:57:36,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:57:36,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:36,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:36,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:57:36,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:57:36,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:57:36,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:57:36,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:57:37,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109582412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:37,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-11-18 19:57:37,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535171078] [2022-11-18 19:57:37,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:37,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:57:37,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:57:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:57:37,097 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:37,267 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-18 19:57:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:57:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-18 19:57:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:37,268 INFO L225 Difference]: With dead ends: 61 [2022-11-18 19:57:37,268 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 19:57:37,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:57:37,269 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 163 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:57:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 19:57:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-11-18 19:57:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 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) [2022-11-18 19:57:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-18 19:57:37,284 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2022-11-18 19:57:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:37,284 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-18 19:57:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:57:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-18 19:57:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 19:57:37,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:37,286 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:37,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:57:37,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1818217164, now seen corresponding path program 4 times [2022-11-18 19:57:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894693851] [2022-11-18 19:57:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:38,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894693851] [2022-11-18 19:57:38,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894693851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351609054] [2022-11-18 19:57:38,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:57:38,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:38,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:38,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:57:38,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:57:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:38,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-18 19:57:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:38,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:57:38,761 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 [2022-11-18 19:57:38,770 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 [2022-11-18 19:57:38,808 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 19:57:38,808 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 [2022-11-18 19:57:38,897 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 19 treesize of output 18 [2022-11-18 19:57:38,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 19:57:38,988 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 19:57:38,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 19:57:39,128 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-18 19:57:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2022-11-18 19:57:39,149 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 19:57:39,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-18 19:57:40,248 INFO L321 Elim1Store]: treesize reduction 200, result has 52.9 percent of original size [2022-11-18 19:57:40,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 345 [2022-11-18 19:57:49,311 INFO L321 Elim1Store]: treesize reduction 167, result has 34.0 percent of original size [2022-11-18 19:57:49,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 141 [2022-11-18 19:57:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:57:49,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:58:11,698 INFO L321 Elim1Store]: treesize reduction 5312, result has 25.8 percent of original size [2022-11-18 19:58:11,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 477330 treesize of output 431885 [2022-11-18 19:58:13,876 INFO L321 Elim1Store]: treesize reduction 11, result has 60.7 percent of original size [2022-11-18 19:58:13,878 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 984609 treesize of output 955977 [2022-11-18 19:59:28,630 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 984 DAG size of output: 954 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 19:59:38,000 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 853 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:00:20,523 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 826 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:01:02,522 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 755 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:02:13,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:02:13,695 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 10974 treesize of output 10470 [2022-11-18 20:02:18,943 INFO L321 Elim1Store]: treesize reduction 1888, result has 25.4 percent of original size [2022-11-18 20:02:18,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 25 new quantified variables, introduced 253 case distinctions, treesize of input 1394123 treesize of output 1310590 [2022-11-18 20:04:10,484 WARN L233 SmtUtils]: Spent 1.86m on a formula simplification. DAG size of input: 2555 DAG size of output: 2476 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:04:16,966 WARN L233 SmtUtils]: Spent 6.46s on a formula simplification that was a NOOP. DAG size: 2466 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:04:33,572 WARN L233 SmtUtils]: Spent 11.13s on a formula simplification that was a NOOP. DAG size: 2206 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:04:44,701 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 2197 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:05:30,251 WARN L233 SmtUtils]: Spent 11.05s on a formula simplification that was a NOOP. DAG size: 2203 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:05:52,064 WARN L233 SmtUtils]: Spent 10.92s on a formula simplification that was a NOOP. DAG size: 2200 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:06:08,418 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 2194 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:06:39,588 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification that was a NOOP. DAG size: 2190 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:07:16,138 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 2194 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:09:27,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:09:27,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 228 treesize of output 335 [2022-11-18 20:09:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:09:29,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351609054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:29,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:29,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-11-18 20:09:29,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238531513] [2022-11-18 20:09:29,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:29,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:09:29,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:29,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:09:29,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1024, Unknown=7, NotChecked=0, Total=1122 [2022-11-18 20:09:29,937 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:30,685 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2022-11-18 20:09:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:09:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2022-11-18 20:09:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:30,687 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:09:30,687 INFO L226 Difference]: Without dead ends: 70 [2022-11-18 20:09:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=122, Invalid=1353, Unknown=7, NotChecked=0, Total=1482 [2022-11-18 20:09:30,688 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:30,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 322 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-18 20:09:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-18 20:09:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-11-18 20:09:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-18 20:09:30,709 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-11-18 20:09:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:30,709 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-18 20:09:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-18 20:09:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:09:30,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:30,711 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:30,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:30,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash -478502972, now seen corresponding path program 5 times [2022-11-18 20:09:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996042441] [2022-11-18 20:09:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:09:32,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996042441] [2022-11-18 20:09:32,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996042441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028134422] [2022-11-18 20:09:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:09:32,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:32,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:32,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:09:32,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:09:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:09:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:32,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:09:32,392 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 [2022-11-18 20:09:32,398 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 [2022-11-18 20:09:32,434 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:09:32,434 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 [2022-11-18 20:09:32,527 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 19 treesize of output 18 [2022-11-18 20:09:32,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:09:32,647 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-18 20:09:32,647 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 20 treesize of output 22 [2022-11-18 20:09:32,790 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:09:32,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2022-11-18 20:09:32,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 20:09:33,362 INFO L321 Elim1Store]: treesize reduction 85, result has 11.5 percent of original size [2022-11-18 20:09:33,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 74 [2022-11-18 20:09:33,383 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-18 20:09:33,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2022-11-18 20:09:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:09:33,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:35,828 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| Int)) (or (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0)) (= (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0)))) is different from false [2022-11-18 20:09:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:45,531 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 4566 treesize of output 4310 [2022-11-18 20:09:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:46,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:46,331 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 3802 treesize of output 3546 [2022-11-18 20:09:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2022-11-18 20:09:47,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028134422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:47,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:47,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-11-18 20:09:47,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097863694] [2022-11-18 20:09:47,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:09:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:09:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1031, Unknown=2, NotChecked=64, Total=1190 [2022-11-18 20:09:47,168 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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) [2022-11-18 20:09:49,332 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| Int)) (or (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0)))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0)) (= (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_30|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0))) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select (select |c_#memory_$Pointer$.base| .cse2) 0) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse2) 0) 0) (= (select |c_#valid| .cse2) 1) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0))) is different from false [2022-11-18 20:09:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:49,801 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-11-18 20:09:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:09:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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) Word has length 31 [2022-11-18 20:09:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:49,802 INFO L225 Difference]: With dead ends: 76 [2022-11-18 20:09:49,802 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:09:49,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=127, Invalid=1210, Unknown=3, NotChecked=142, Total=1482 [2022-11-18 20:09:49,804 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:49,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 325 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-11-18 20:09:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:09:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-11-18 20:09:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-18 20:09:49,822 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 31 [2022-11-18 20:09:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-18 20:09:49,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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) [2022-11-18 20:09:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-18 20:09:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 20:09:49,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:49,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:49,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:50,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:09:50,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1667307781, now seen corresponding path program 6 times [2022-11-18 20:09:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:50,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866030027] [2022-11-18 20:09:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:09:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866030027] [2022-11-18 20:09:50,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866030027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439749909] [2022-11-18 20:09:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:09:50,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:50,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:09:50,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:09:50,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:50,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:09:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:09:50,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:09:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439749909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:50,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:50,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-18 20:09:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230933332] [2022-11-18 20:09:50,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:09:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:09:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:09:50,538 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:50,762 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-11-18 20:09:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:09:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 32 [2022-11-18 20:09:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:50,764 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:09:50,764 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 20:09:50,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:09:50,765 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:50,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 123 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:09:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 20:09:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-11-18 20:09:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) 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) [2022-11-18 20:09:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-11-18 20:09:50,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 32 [2022-11-18 20:09:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:50,781 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-11-18 20:09:50,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-11-18 20:09:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:09:50,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:50,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:50,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:09:50,988 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1720169181, now seen corresponding path program 7 times [2022-11-18 20:09:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:50,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835249485] [2022-11-18 20:09:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:09:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835249485] [2022-11-18 20:09:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835249485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828913960] [2022-11-18 20:09:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:09:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:51,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:51,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:09:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:09:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:09:51,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:09:51,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828913960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:51,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:51,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-18 20:09:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274148910] [2022-11-18 20:09:51,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:09:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:09:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:09:51,390 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:51,524 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-11-18 20:09:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:09:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 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 33 [2022-11-18 20:09:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:51,525 INFO L225 Difference]: With dead ends: 62 [2022-11-18 20:09:51,525 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 20:09:51,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:09:51,526 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:51,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 64 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:09:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 20:09:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-18 20:09:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2022-11-18 20:09:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-18 20:09:51,536 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2022-11-18 20:09:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:51,536 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-18 20:09:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:09:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-18 20:09:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:09:51,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:51,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:51,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 20:09:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:09:51,743 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -813431196, now seen corresponding path program 8 times [2022-11-18 20:09:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122309577] [2022-11-18 20:09:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:09:52,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122309577] [2022-11-18 20:09:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122309577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346974512] [2022-11-18 20:09:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:09:52,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:52,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:52,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:09:52,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:09:52,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:09:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:52,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:09:52,939 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 [2022-11-18 20:09:52,980 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:09:52,980 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 [2022-11-18 20:09:53,070 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 [2022-11-18 20:09:53,085 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 20 treesize of output 19 [2022-11-18 20:09:53,189 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-18 20:09:53,189 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 20 treesize of output 22 [2022-11-18 20:09:53,324 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:09:53,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 37 [2022-11-18 20:09:53,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:09:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:09:53,705 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:09:53,705 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-11-18 20:09:53,786 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-18 20:09:53,786 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2022-11-18 20:09:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:09:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:57,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:09:57,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346974512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:57,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:57,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-18 20:09:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911547541] [2022-11-18 20:09:57,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:57,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:09:57,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:09:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:09:57,674 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:12,198 WARN L233 SmtUtils]: Spent 9.93s on a formula simplification. DAG size of input: 111 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:10:38,316 WARN L233 SmtUtils]: Spent 19.77s on a formula simplification. DAG size of input: 132 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:10:50,432 WARN L233 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 136 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:10:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:50,470 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-11-18 20:10:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:10:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2022-11-18 20:10:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:50,471 INFO L225 Difference]: With dead ends: 44 [2022-11-18 20:10:50,471 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 20:10:50,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=285, Invalid=1517, Unknown=4, NotChecked=0, Total=1806 [2022-11-18 20:10:50,473 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:50,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 317 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-11-18 20:10:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 20:10:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-18 20:10:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) 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) [2022-11-18 20:10:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-18 20:10:50,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2022-11-18 20:10:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:50,495 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-18 20:10:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-18 20:10:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 20:10:50,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:50,496 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:50,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:50,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:50,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash 605090964, now seen corresponding path program 9 times [2022-11-18 20:10:50,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:50,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872638949] [2022-11-18 20:10:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:50,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:10:51,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872638949] [2022-11-18 20:10:51,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872638949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267458762] [2022-11-18 20:10:51,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:10:51,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:51,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:51,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:51,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:10:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:10:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:10:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:10:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:10:51,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267458762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:51,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:51,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-11-18 20:10:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545681116] [2022-11-18 20:10:51,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:10:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:10:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:10:51,854 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:52,195 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-11-18 20:10:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:10:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-18 20:10:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:52,197 INFO L225 Difference]: With dead ends: 72 [2022-11-18 20:10:52,197 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 20:10:52,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:10:52,198 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:52,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 246 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:10:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 20:10:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-18 20:10:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-11-18 20:10:52,219 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 36 [2022-11-18 20:10:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:52,219 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-11-18 20:10:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-11-18 20:10:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:10:52,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:52,220 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:52,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:10:52,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1629604964, now seen corresponding path program 10 times [2022-11-18 20:10:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:52,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229036039] [2022-11-18 20:10:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229036039] [2022-11-18 20:10:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229036039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107193689] [2022-11-18 20:10:55,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:10:55,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:55,202 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:55,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2510c41f-e50a-46ce-a891-9c5baca5b79f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:10:55,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:10:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:55,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 20:10:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:10:55,373 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 [2022-11-18 20:10:55,384 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 [2022-11-18 20:10:55,417 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:10:55,418 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 [2022-11-18 20:10:55,522 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 19 treesize of output 18 [2022-11-18 20:10:55,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:10:55,655 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-18 20:10:55,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-18 20:10:55,833 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:10:55,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2022-11-18 20:10:55,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 20:10:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:10:56,019 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-18 20:10:56,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-11-18 20:10:56,210 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-18 20:10:56,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 68 [2022-11-18 20:10:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:10:56,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2022-11-18 20:10:57,136 INFO L321 Elim1Store]: treesize reduction 194, result has 10.2 percent of original size [2022-11-18 20:10:57,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 251 treesize of output 121 [2022-11-18 20:10:57,173 INFO L321 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2022-11-18 20:10:57,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 34 [2022-11-18 20:10:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:57,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:59,867 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| Int)) (or (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0)) (= (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_52|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse6 (select (select .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse7 (select (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select .cse4 (select (select .cse5 .cse6) .cse7)) (select (select .cse4 .cse6) .cse7)))) 0)))) is different from false [2022-11-18 20:11:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:30,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:32,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:32,303 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 1276011 treesize of output 1110276 [2022-11-18 20:11:37,450 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 368 DAG size of output: 348 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:11:37,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:37,785 INFO L173 IndexEqualityManager]: detected equality via solver