./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:59:55,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:59:55,520 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:59:55,528 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:59:55,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:59:55,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:59:55,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:59:55,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:59:55,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:59:55,573 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:59:55,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:59:55,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:59:55,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:59:55,578 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:59:55,578 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:59:55,579 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:59:55,579 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:59:55,580 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:59:55,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:59:55,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:59:55,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:59:55,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:59:55,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:59:55,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:59:55,583 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:59:55,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:59:55,584 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:59:55,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:59:55,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:59:55,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:59:55,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:59:55,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:55,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:59:55,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:59:55,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:59:55,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:59:55,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:59:55,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:59:55,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:59:55,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:59:55,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:59:55,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:59:55,591 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2023-11-21 20:59:55,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:59:55,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:59:55,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:59:55,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:59:55,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:59:55,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2023-11-21 20:59:59,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:59:59,328 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:59:59,329 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2023-11-21 20:59:59,338 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/data/e59a113dd/2d9f369d41ea40ae9b3359ac6b7bb850/FLAG84b8ac9b4 [2023-11-21 20:59:59,353 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/data/e59a113dd/2d9f369d41ea40ae9b3359ac6b7bb850 [2023-11-21 20:59:59,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:59:59,358 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:59:59,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:59,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:59:59,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:59:59,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4f9323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59, skipping insertion in model container [2023-11-21 20:59:59,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:59:59,645 WARN L240 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_5d759085-5c7a-4b6a-9fc5-8e050181d216/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2023-11-21 20:59:59,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:59,687 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:59:59,701 WARN L240 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_5d759085-5c7a-4b6a-9fc5-8e050181d216/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2023-11-21 20:59:59,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:59,735 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:59:59,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59 WrapperNode [2023-11-21 20:59:59,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:59,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:59,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:59:59,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:59:59,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,755 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,777 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2023-11-21 20:59:59,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:59,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:59:59,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:59:59,779 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:59:59,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,795 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,810 INFO L187 HeapSplitter]: Split 66 memory accesses to 6 slices as follows [2, 21, 15, 11, 12, 5] [2023-11-21 20:59:59,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:59:59,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:59:59,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:59:59,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:59:59,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (1/1) ... [2023-11-21 20:59:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:59,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:59:59,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 20:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-21 20:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-21 20:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2023-11-21 20:59:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2023-11-21 20:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:59:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 20:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 20:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 20:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-21 20:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-21 20:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-21 20:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 20:59:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 20:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:00:00,045 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:00,048 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:00,372 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:00,415 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:00,425 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 21:00:00,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:00 BoogieIcfgContainer [2023-11-21 21:00:00,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:00,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:00,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:00,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:00,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:59:59" (1/3) ... [2023-11-21 21:00:00,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6129e3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:00, skipping insertion in model container [2023-11-21 21:00:00,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:59" (2/3) ... [2023-11-21 21:00:00,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6129e3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:00, skipping insertion in model container [2023-11-21 21:00:00,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:00" (3/3) ... [2023-11-21 21:00:00,439 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2023-11-21 21:00:00,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:00,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:00:00,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:00,526 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=LoopHeads, 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;@451e71cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:00,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:00:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 21:00:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 21:00:00,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:00,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:00,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:00,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1371458259, now seen corresponding path program 1 times [2023-11-21 21:00:00,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:00,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878418106] [2023-11-21 21:00:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:00,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:01,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878418106] [2023-11-21 21:00:01,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878418106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:01,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:01,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389156392] [2023-11-21 21:00:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:01,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:01,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:01,628 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:02,207 INFO L93 Difference]: Finished difference Result 106 states and 168 transitions. [2023-11-21 21:00:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 21:00:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:02,223 INFO L225 Difference]: With dead ends: 106 [2023-11-21 21:00:02,223 INFO L226 Difference]: Without dead ends: 67 [2023-11-21 21:00:02,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:02,235 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:02,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-21 21:00:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-11-21 21:00:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-21 21:00:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2023-11-21 21:00:02,296 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 8 [2023-11-21 21:00:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:02,297 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2023-11-21 21:00:02,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2023-11-21 21:00:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 21:00:02,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:02,299 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:00:02,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:02,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005840, now seen corresponding path program 1 times [2023-11-21 21:00:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67672178] [2023-11-21 21:00:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:02,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030555526] [2023-11-21 21:00:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:02,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:02,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:00:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:02,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 21:00:02,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:02,565 INFO L378 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 [2023-11-21 21:00:02,571 INFO L378 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 [2023-11-21 21:00:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:02,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:03,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67672178] [2023-11-21 21:00:03,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:03,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030555526] [2023-11-21 21:00:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030555526] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:03,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:00:03,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2023-11-21 21:00:03,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150829756] [2023-11-21 21:00:03,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:03,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:03,066 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:03,391 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2023-11-21 21:00:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:00:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-21 21:00:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:03,394 INFO L225 Difference]: With dead ends: 73 [2023-11-21 21:00:03,394 INFO L226 Difference]: Without dead ends: 71 [2023-11-21 21:00:03,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:00:03,396 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:03,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 159 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-21 21:00:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2023-11-21 21:00:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-21 21:00:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2023-11-21 21:00:03,414 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 14 [2023-11-21 21:00:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:03,414 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2023-11-21 21:00:03,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2023-11-21 21:00:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 21:00:03,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:03,416 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:03,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 21:00:03,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:03,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1652518129, now seen corresponding path program 1 times [2023-11-21 21:00:03,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593057488] [2023-11-21 21:00:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645615711] [2023-11-21 21:00:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:03,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:03,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:00:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-21 21:00:03,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:03,815 INFO L378 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 [2023-11-21 21:00:03,821 INFO L378 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 [2023-11-21 21:00:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:04,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:04,511 INFO L378 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 32 treesize of output 24 [2023-11-21 21:00:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:04,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593057488] [2023-11-21 21:00:04,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:04,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645615711] [2023-11-21 21:00:04,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645615711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:04,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:04,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2023-11-21 21:00:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200800103] [2023-11-21 21:00:04,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 21:00:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 21:00:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-21 21:00:04,650 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 21:00:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:05,808 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2023-11-21 21:00:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 21:00:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-11-21 21:00:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:05,810 INFO L225 Difference]: With dead ends: 83 [2023-11-21 21:00:05,810 INFO L226 Difference]: Without dead ends: 81 [2023-11-21 21:00:05,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2023-11-21 21:00:05,813 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:05,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 146 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 21:00:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-21 21:00:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2023-11-21 21:00:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2023-11-21 21:00:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2023-11-21 21:00:05,836 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 20 [2023-11-21 21:00:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:05,837 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2023-11-21 21:00:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 21:00:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2023-11-21 21:00:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 21:00:05,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:05,838 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:05,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:06,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:06,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:06,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1440093584, now seen corresponding path program 1 times [2023-11-21 21:00:06,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:06,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420057031] [2023-11-21 21:00:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:06,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209924288] [2023-11-21 21:00:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:06,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:06,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:06,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:00:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-21 21:00:06,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:06,244 INFO L378 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 [2023-11-21 21:00:06,249 INFO L378 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 [2023-11-21 21:00:06,258 INFO L378 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 [2023-11-21 21:00:06,266 INFO L378 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 [2023-11-21 21:00:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:00:06,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 21:00:07,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:07,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420057031] [2023-11-21 21:00:07,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209924288] [2023-11-21 21:00:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209924288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:07,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:07,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-21 21:00:07,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078793615] [2023-11-21 21:00:07,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 21:00:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:07,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 21:00:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-21 21:00:07,685 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 21 states, 15 states have (on average 1.8) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 21:00:10,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-21 21:00:13,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-21 21:00:18,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-21 21:00:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:18,751 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2023-11-21 21:00:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-21 21:00:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.8) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-11-21 21:00:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:18,755 INFO L225 Difference]: With dead ends: 109 [2023-11-21 21:00:18,755 INFO L226 Difference]: Without dead ends: 107 [2023-11-21 21:00:18,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2023-11-21 21:00:18,758 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:18,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 131 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 615 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2023-11-21 21:00:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-21 21:00:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-11-21 21:00:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2023-11-21 21:00:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2023-11-21 21:00:18,789 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 26 [2023-11-21 21:00:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:18,789 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2023-11-21 21:00:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.8) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 21:00:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2023-11-21 21:00:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 21:00:18,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:18,791 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:18,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:19,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:19,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:19,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1224682067, now seen corresponding path program 1 times [2023-11-21 21:00:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:19,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9975004] [2023-11-21 21:00:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:19,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872732965] [2023-11-21 21:00:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:19,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:19,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:19,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:19,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:00:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:19,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 21:00:19,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:19,176 INFO L378 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 [2023-11-21 21:00:19,184 INFO L378 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 [2023-11-21 21:00:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 21:00:19,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:20,108 INFO L378 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 46 treesize of output 30 [2023-11-21 21:00:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 21:00:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9975004] [2023-11-21 21:00:20,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:20,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872732965] [2023-11-21 21:00:20,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872732965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:20,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:20,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-11-21 21:00:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445249423] [2023-11-21 21:00:20,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:20,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 21:00:20,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 21:00:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-21 21:00:20,218 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 21:00:26,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-21 21:00:34,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-21 21:00:36,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-21 21:00:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:37,529 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2023-11-21 21:00:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 21:00:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2023-11-21 21:00:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:37,532 INFO L225 Difference]: With dead ends: 118 [2023-11-21 21:00:37,532 INFO L226 Difference]: Without dead ends: 116 [2023-11-21 21:00:37,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2023-11-21 21:00:37,534 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 83 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:37,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 111 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 426 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2023-11-21 21:00:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-21 21:00:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2023-11-21 21:00:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 30 states have call successors, (30), 12 states have call predecessors, (30), 13 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2023-11-21 21:00:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2023-11-21 21:00:37,568 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 32 [2023-11-21 21:00:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:37,568 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2023-11-21 21:00:37,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 21:00:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2023-11-21 21:00:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 21:00:37,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:37,571 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:37,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:37,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:37,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:37,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1299588988, now seen corresponding path program 1 times [2023-11-21 21:00:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:37,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696651912] [2023-11-21 21:00:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:37,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73316453] [2023-11-21 21:00:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:37,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:37,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:00:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:37,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-21 21:00:37,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:38,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-21 21:00:38,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-21 21:00:38,251 INFO L378 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 23 treesize of output 15 [2023-11-21 21:00:38,254 INFO L378 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 19 treesize of output 11 [2023-11-21 21:00:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 21:00:38,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 21:00:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696651912] [2023-11-21 21:00:40,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:40,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73316453] [2023-11-21 21:00:40,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73316453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:40,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:40,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2023-11-21 21:00:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654341446] [2023-11-21 21:00:40,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:40,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 21:00:40,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 21:00:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2023-11-21 21:00:40,596 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 1 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 21:00:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:41,813 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2023-11-21 21:00:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 1 states have call predecessors, (10), 3 states have call successors, (10) Word has length 42 [2023-11-21 21:00:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:41,817 INFO L225 Difference]: With dead ends: 123 [2023-11-21 21:00:41,817 INFO L226 Difference]: Without dead ends: 121 [2023-11-21 21:00:41,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=98, Invalid=363, Unknown=1, NotChecked=0, Total=462 [2023-11-21 21:00:41,819 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:41,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 21:00:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-21 21:00:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-21 21:00:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-21 21:00:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2023-11-21 21:00:41,856 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 42 [2023-11-21 21:00:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:41,857 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2023-11-21 21:00:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (10), 1 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-21 21:00:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2023-11-21 21:00:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 21:00:41,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:41,859 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:41,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:42,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:42,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash 277886434, now seen corresponding path program 1 times [2023-11-21 21:00:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:42,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762869923] [2023-11-21 21:00:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:42,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292208277] [2023-11-21 21:00:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:42,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:42,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:00:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:42,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 21:00:42,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:42,232 INFO L378 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 [2023-11-21 21:00:42,241 INFO L378 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 [2023-11-21 21:00:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 21:00:42,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:42,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762869923] [2023-11-21 21:00:42,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:42,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292208277] [2023-11-21 21:00:42,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292208277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:42,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:42,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:42,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532380157] [2023-11-21 21:00:42,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:00:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:00:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:42,494 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 21:00:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:43,084 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2023-11-21 21:00:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-11-21 21:00:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:43,086 INFO L225 Difference]: With dead ends: 127 [2023-11-21 21:00:43,087 INFO L226 Difference]: Without dead ends: 125 [2023-11-21 21:00:43,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:43,088 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:43,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 62 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-21 21:00:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-21 21:00:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 80 states have internal predecessors, (82), 30 states have call successors, (30), 14 states have call predecessors, (30), 17 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-21 21:00:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-11-21 21:00:43,138 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2023-11-21 21:00:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:43,138 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-11-21 21:00:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 21:00:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-11-21 21:00:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 21:00:43,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:43,140 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:43,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:43,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:43,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash -560035385, now seen corresponding path program 2 times [2023-11-21 21:00:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:43,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787564822] [2023-11-21 21:00:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:43,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:43,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283700797] [2023-11-21 21:00:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:00:43,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:43,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:43,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 21:00:43,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:00:43,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:43,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-21 21:00:43,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:43,579 INFO L378 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 [2023-11-21 21:00:43,589 INFO L378 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 [2023-11-21 21:00:45,426 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-11-21 21:00:45,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 29 [2023-11-21 21:00:45,496 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-11-21 21:00:45,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 29 [2023-11-21 21:00:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 21:00:45,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:46,926 INFO L378 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 51 treesize of output 43 [2023-11-21 21:00:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-21 21:00:47,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787564822] [2023-11-21 21:00:47,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283700797] [2023-11-21 21:00:47,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283700797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:47,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:47,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2023-11-21 21:00:47,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860368989] [2023-11-21 21:00:47,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 21:00:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 21:00:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-11-21 21:00:47,038 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-21 21:00:50,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-11-21 21:00:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:53,795 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2023-11-21 21:00:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-21 21:00:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 48 [2023-11-21 21:00:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:53,799 INFO L225 Difference]: With dead ends: 159 [2023-11-21 21:00:53,799 INFO L226 Difference]: Without dead ends: 157 [2023-11-21 21:00:53,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=352, Invalid=2300, Unknown=0, NotChecked=0, Total=2652 [2023-11-21 21:00:53,802 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 147 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:53,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 207 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-21 21:00:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-21 21:00:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2023-11-21 21:00:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.063157894736842) internal successors, (101), 98 states have internal predecessors, (101), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2023-11-21 21:00:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2023-11-21 21:00:53,853 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 48 [2023-11-21 21:00:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:53,854 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2023-11-21 21:00:53,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-21 21:00:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2023-11-21 21:00:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 21:00:53,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:53,856 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:53,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 21:00:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:54,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:54,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1232163489, now seen corresponding path program 1 times [2023-11-21 21:00:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:54,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572911302] [2023-11-21 21:00:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:54,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659200575] [2023-11-21 21:00:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:54,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:54,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 21:00:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:54,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-21 21:00:54,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:54,249 INFO L378 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 15 treesize of output 1 [2023-11-21 21:00:54,253 INFO L378 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 [2023-11-21 21:00:54,264 INFO L378 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 [2023-11-21 21:00:54,928 INFO L378 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 7 treesize of output 3 [2023-11-21 21:00:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 21:00:55,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:55,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572911302] [2023-11-21 21:00:55,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 21:00:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659200575] [2023-11-21 21:00:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659200575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:55,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:00:55,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-21 21:00:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588540329] [2023-11-21 21:00:55,563 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 21:00:55,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 21:00:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:55,568 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 21:00:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:56,540 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2023-11-21 21:00:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 21:00:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2023-11-21 21:00:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:56,543 INFO L225 Difference]: With dead ends: 161 [2023-11-21 21:00:56,544 INFO L226 Difference]: Without dead ends: 159 [2023-11-21 21:00:56,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-21 21:00:56,545 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:56,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 96 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 277 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 21:00:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-21 21:00:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2023-11-21 21:00:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 101 states have internal predecessors, (104), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2023-11-21 21:00:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2023-11-21 21:00:56,612 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 48 [2023-11-21 21:00:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:56,613 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2023-11-21 21:00:56,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 21:00:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2023-11-21 21:00:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 21:00:56,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:56,616 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:56,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:56,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:56,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:00:56,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1233992248, now seen corresponding path program 3 times [2023-11-21 21:00:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332259891] [2023-11-21 21:00:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:56,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 21:00:56,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250153086] [2023-11-21 21:00:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 21:00:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:56,840 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:56,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d759085-5c7a-4b6a-9fc5-8e050181d216/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 21:00:57,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 21:00:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:00:57,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-21 21:00:57,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:57,046 INFO L378 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 [2023-11-21 21:00:57,054 INFO L378 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 [2023-11-21 21:00:57,065 INFO L378 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 [2023-11-21 21:00:57,077 INFO L378 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 [2023-11-21 21:00:58,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 21:00:58,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 21:00:58,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 21:00:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-21 21:00:58,917 INFO L327 TraceCheckSpWp]: Computing backward predicates...