./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB --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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:17:58,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:17:58,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:17:58,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:17:58,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:17:58,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:17:58,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:17:58,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:17:58,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:17:58,464 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:17:58,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:17:58,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:17:58,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:17:58,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:17:58,466 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:17:58,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:17:58,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:17:58,468 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:17:58,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:17:58,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:17:58,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:17:58,469 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:17:58,470 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:17:58,470 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:17:58,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:17:58,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:17:58,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:17:58,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:17:58,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:17:58,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:17:58,472 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:17:58,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:17:58,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:17:58,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:17:58,473 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:17:58,473 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:17:58,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:17:58,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:17:58,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:17:58,474 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:17:58,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:17:58,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:17:58,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:17:58,475 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae [2024-11-28 04:17:58,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:17:58,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:17:58,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:17:58,836 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:17:58,837 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:17:58,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-11-28 04:18:02,028 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/data/7222e9e7d/9694d27b989342cb99e7cfa23be0f0cb/FLAG701f3e9f6 [2024-11-28 04:18:02,345 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:18:02,350 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-11-28 04:18:02,362 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/data/7222e9e7d/9694d27b989342cb99e7cfa23be0f0cb/FLAG701f3e9f6 [2024-11-28 04:18:02,394 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/data/7222e9e7d/9694d27b989342cb99e7cfa23be0f0cb [2024-11-28 04:18:02,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:18:02,399 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:18:02,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:18:02,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:18:02,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:18:02,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d255595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02, skipping insertion in model container [2024-11-28 04:18:02,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,437 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:18:02,636 WARN L250 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_764c3c68-abc4-4778-a93c-862565835103/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-11-28 04:18:02,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:18:02,689 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:18:02,703 WARN L250 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_764c3c68-abc4-4778-a93c-862565835103/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-11-28 04:18:02,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:18:02,735 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:18:02,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02 WrapperNode [2024-11-28 04:18:02,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:18:02,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:18:02,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:18:02,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:18:02,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,772 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-11-28 04:18:02,773 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:18:02,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:18:02,774 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:18:02,774 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:18:02,784 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,787 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,806 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 6, 8, 10, 8, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 3, 2, 3, 1, 1]. [2024-11-28 04:18:02,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,807 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,822 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:18:02,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:18:02,834 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:18:02,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:18:02,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (1/1) ... [2024-11-28 04:18:02,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:18:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:02,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:18:02,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-28 04:18:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-11-28 04:18:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-11-28 04:18:02,913 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:18:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:18:02,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-28 04:18:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-28 04:18:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-28 04:18:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:18:02,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:18:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:18:03,061 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:18:03,064 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:18:03,473 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 04:18:03,473 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:18:03,484 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:18:03,485 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 04:18:03,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:18:03 BoogieIcfgContainer [2024-11-28 04:18:03,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:18:03,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:18:03,488 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:18:03,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:18:03,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:18:02" (1/3) ... [2024-11-28 04:18:03,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47adc6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:18:03, skipping insertion in model container [2024-11-28 04:18:03,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:18:02" (2/3) ... [2024-11-28 04:18:03,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47adc6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:18:03, skipping insertion in model container [2024-11-28 04:18:03,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:18:03" (3/3) ... [2024-11-28 04:18:03,497 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-11-28 04:18:03,521 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:18:03,523 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_cohendiv-ll.c that has 4 procedures, 43 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 04:18:03,605 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:18:03,625 INFO L333 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, 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;@63b6a4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:18:03,625 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:18:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 04:18:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:18:03,639 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:03,640 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:03,640 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:03,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 389886345, now seen corresponding path program 1 times [2024-11-28 04:18:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531043211] [2024-11-28 04:18:03,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:03,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:03,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531043211] [2024-11-28 04:18:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531043211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:03,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:18:03,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106118011] [2024-11-28 04:18:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:03,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:18:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:03,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:18:03,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:18:03,926 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:03,960 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2024-11-28 04:18:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:18:03,963 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 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 11 [2024-11-28 04:18:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:03,970 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:18:03,970 INFO L226 Difference]: Without dead ends: 39 [2024-11-28 04:18:03,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:18:03,977 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:03,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:18:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-28 04:18:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-28 04:18:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.125) internal successors, (27), 27 states have internal predecessors, (27), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 04:18:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-11-28 04:18:04,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 11 [2024-11-28 04:18:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:04,036 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-11-28 04:18:04,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-11-28 04:18:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:18:04,038 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:04,038 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:04,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:18:04,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:04,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1069944715, now seen corresponding path program 1 times [2024-11-28 04:18:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077865024] [2024-11-28 04:18:04,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:04,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:04,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374351236] [2024-11-28 04:18:04,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:04,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:04,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:18:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:04,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:18:04,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:04,550 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 [2024-11-28 04:18:04,574 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 [2024-11-28 04:18:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:04,854 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:18:04,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077865024] [2024-11-28 04:18:04,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:04,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374351236] [2024-11-28 04:18:04,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374351236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:04,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:04,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:18:04,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805567453] [2024-11-28 04:18:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:04,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:18:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:04,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:18:04,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:18:04,862 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-11-28 04:18:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:05,192 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-28 04:18:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:18:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 11 [2024-11-28 04:18:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:05,194 INFO L225 Difference]: With dead ends: 56 [2024-11-28 04:18:05,195 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:18:05,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:18:05,196 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:05,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 249 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:18:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:18:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-11-28 04:18:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-28 04:18:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-11-28 04:18:05,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 11 [2024-11-28 04:18:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:05,210 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-11-28 04:18:05,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-11-28 04:18:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-11-28 04:18:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 04:18:05,211 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:05,211 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:05,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:18:05,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:05,412 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:05,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1882485824, now seen corresponding path program 1 times [2024-11-28 04:18:05,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:05,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349709077] [2024-11-28 04:18:05,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:05,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:05,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927078711] [2024-11-28 04:18:05,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:05,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:18:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:05,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 04:18:05,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:05,721 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 [2024-11-28 04:18:05,735 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 11 [2024-11-28 04:18:05,748 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 [2024-11-28 04:18:06,004 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 [2024-11-28 04:18:06,010 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 15 treesize of output 7 [2024-11-28 04:18:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:06,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:06,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349709077] [2024-11-28 04:18:06,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:06,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927078711] [2024-11-28 04:18:06,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927078711] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:06,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:18:06,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-11-28 04:18:06,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818097132] [2024-11-28 04:18:06,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:06,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:18:06,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:06,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:18:06,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:18:06,293 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-28 04:18:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:06,538 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-11-28 04:18:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:18:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2024-11-28 04:18:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:06,541 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:18:06,541 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:18:06,541 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:18:06,542 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:06,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 252 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:18:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:18:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-28 04:18:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-28 04:18:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-28 04:18:06,555 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 17 [2024-11-28 04:18:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:06,555 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-28 04:18:06,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-28 04:18:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-28 04:18:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:18:06,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:06,557 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:06,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:18:06,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:06,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:06,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1124067473, now seen corresponding path program 1 times [2024-11-28 04:18:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:06,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171275365] [2024-11-28 04:18:06,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:06,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511180812] [2024-11-28 04:18:06,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:06,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:06,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:18:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:07,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 04:18:07,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:07,024 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 [2024-11-28 04:18:07,043 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 11 [2024-11-28 04:18:07,051 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 [2024-11-28 04:18:07,129 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 [2024-11-28 04:18:07,133 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 15 treesize of output 7 [2024-11-28 04:18:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:18:07,180 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:18:07,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171275365] [2024-11-28 04:18:07,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511180812] [2024-11-28 04:18:07,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511180812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:07,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:07,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:18:07,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181189189] [2024-11-28 04:18:07,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:07,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:18:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:07,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:18:07,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:18:07,182 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:18:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:07,471 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2024-11-28 04:18:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:18:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-28 04:18:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:07,474 INFO L225 Difference]: With dead ends: 77 [2024-11-28 04:18:07,474 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 04:18:07,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:18:07,475 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:07,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 224 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:18:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 04:18:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2024-11-28 04:18:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.108695652173913) internal successors, (51), 49 states have internal predecessors, (51), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-11-28 04:18:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2024-11-28 04:18:07,498 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 27 [2024-11-28 04:18:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:07,498 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2024-11-28 04:18:07,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:18:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2024-11-28 04:18:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:18:07,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:07,499 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:07,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:07,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:07,704 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:07,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1573514457, now seen corresponding path program 1 times [2024-11-28 04:18:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131380144] [2024-11-28 04:18:07,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295374297] [2024-11-28 04:18:07,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:07,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:07,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:18:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:07,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 04:18:07,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:07,987 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 [2024-11-28 04:18:07,997 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 [2024-11-28 04:18:08,004 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 11 [2024-11-28 04:18:08,032 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 11 treesize of output 7 [2024-11-28 04:18:08,265 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 [2024-11-28 04:18:08,270 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 15 treesize of output 7 [2024-11-28 04:18:08,278 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 [2024-11-28 04:18:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:18:08,329 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:18:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131380144] [2024-11-28 04:18:08,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295374297] [2024-11-28 04:18:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295374297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:18:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844060103] [2024-11-28 04:18:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:08,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:18:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:08,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:18:08,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:18:08,332 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:18:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:08,701 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2024-11-28 04:18:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:18:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-28 04:18:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:08,704 INFO L225 Difference]: With dead ends: 81 [2024-11-28 04:18:08,705 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 04:18:08,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:18:08,707 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:08,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 63 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:18:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 04:18:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-28 04:18:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-11-28 04:18:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2024-11-28 04:18:08,739 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 27 [2024-11-28 04:18:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:08,739 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2024-11-28 04:18:08,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:18:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2024-11-28 04:18:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:18:08,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:08,741 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:08,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:18:08,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:08,942 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:08,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash 820461351, now seen corresponding path program 1 times [2024-11-28 04:18:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:08,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344600347] [2024-11-28 04:18:08,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:08,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333631905] [2024-11-28 04:18:09,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:09,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:09,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:18:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:09,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 04:18:09,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:09,283 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 [2024-11-28 04:18:09,290 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 [2024-11-28 04:18:09,298 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 11 [2024-11-28 04:18:09,821 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 [2024-11-28 04:18:09,827 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 15 treesize of output 7 [2024-11-28 04:18:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:18:09,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:18:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344600347] [2024-11-28 04:18:10,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333631905] [2024-11-28 04:18:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333631905] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:10,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:18:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-11-28 04:18:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678730775] [2024-11-28 04:18:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:10,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:18:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:10,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:18:10,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:18:10,106 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:18:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:10,549 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2024-11-28 04:18:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:18:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-28 04:18:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:10,552 INFO L225 Difference]: With dead ends: 104 [2024-11-28 04:18:10,552 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 04:18:10,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:18:10,553 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:10,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 244 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:18:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 04:18:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-11-28 04:18:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.09375) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-28 04:18:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2024-11-28 04:18:10,581 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 33 [2024-11-28 04:18:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:10,581 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2024-11-28 04:18:10,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:18:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2024-11-28 04:18:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:18:10,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:10,582 INFO L218 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:10,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:10,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:18:10,783 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:10,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -141130275, now seen corresponding path program 1 times [2024-11-28 04:18:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:10,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153110374] [2024-11-28 04:18:10,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:10,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:18:12,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:12,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153110374] [2024-11-28 04:18:12,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153110374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:12,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:12,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-28 04:18:12,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856328652] [2024-11-28 04:18:12,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:12,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:18:12,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:12,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:18:12,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:18:12,337 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:18:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:12,952 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-28 04:18:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:18:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-28 04:18:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:12,957 INFO L225 Difference]: With dead ends: 107 [2024-11-28 04:18:12,958 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 04:18:12,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:18:12,960 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:12,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 248 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:18:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 04:18:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-28 04:18:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 71 states have internal predecessors, (73), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-28 04:18:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-11-28 04:18:12,999 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 39 [2024-11-28 04:18:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:13,000 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-11-28 04:18:13,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:18:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-11-28 04:18:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:18:13,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:13,001 INFO L218 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, 1, 1, 1, 1] [2024-11-28 04:18:13,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:18:13,001 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:13,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -123525151, now seen corresponding path program 1 times [2024-11-28 04:18:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616786803] [2024-11-28 04:18:13,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481459233] [2024-11-28 04:18:13,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:13,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:13,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:13,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:18:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:13,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 04:18:13,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:13,296 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 [2024-11-28 04:18:13,299 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 [2024-11-28 04:18:13,305 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 15 treesize of output 11 [2024-11-28 04:18:13,311 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 [2024-11-28 04:18:13,330 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 [2024-11-28 04:18:13,341 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 [2024-11-28 04:18:13,690 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 [2024-11-28 04:18:18,027 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 21 treesize of output 13 [2024-11-28 04:18:18,032 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 17 treesize of output 9 [2024-11-28 04:18:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:18:18,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:18:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616786803] [2024-11-28 04:18:18,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481459233] [2024-11-28 04:18:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481459233] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:18,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:18:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2024-11-28 04:18:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529106407] [2024-11-28 04:18:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:18,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:18:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:18,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:18:18,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2024-11-28 04:18:18,615 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:18:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:19,396 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2024-11-28 04:18:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:18:19,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-11-28 04:18:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:19,401 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:18:19,403 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 04:18:19,403 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2024-11-28 04:18:19,404 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:19,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 242 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:18:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 04:18:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2024-11-28 04:18:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 76 states have internal predecessors, (76), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (29), 23 states have call predecessors, (29), 26 states have call successors, (29) [2024-11-28 04:18:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2024-11-28 04:18:19,454 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 46 [2024-11-28 04:18:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:19,454 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2024-11-28 04:18:19,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:18:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2024-11-28 04:18:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:18:19,460 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:19,460 INFO L218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:19,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:19,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:19,661 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:19,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1401802640, now seen corresponding path program 1 times [2024-11-28 04:18:19,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:19,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949712407] [2024-11-28 04:18:19,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:19,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:19,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936024567] [2024-11-28 04:18:19,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:19,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:19,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:19,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:18:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:19,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 04:18:19,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:19,990 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 [2024-11-28 04:18:19,999 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 [2024-11-28 04:18:20,007 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 11 [2024-11-28 04:18:20,035 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 11 treesize of output 7 [2024-11-28 04:18:20,204 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 [2024-11-28 04:18:20,210 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 15 treesize of output 7 [2024-11-28 04:18:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:18:20,265 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:18:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949712407] [2024-11-28 04:18:20,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936024567] [2024-11-28 04:18:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936024567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:18:20,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:18:20,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:18:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663365600] [2024-11-28 04:18:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:18:20,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:18:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:20,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:18:20,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:18:20,267 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:18:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:20,889 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2024-11-28 04:18:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:18:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2024-11-28 04:18:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:20,891 INFO L225 Difference]: With dead ends: 139 [2024-11-28 04:18:20,892 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 04:18:20,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:18:20,893 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 31 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:20,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:18:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 04:18:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2024-11-28 04:18:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 91 states have internal predecessors, (91), 32 states have call successors, (32), 15 states have call predecessors, (32), 18 states have return successors, (41), 29 states have call predecessors, (41), 31 states have call successors, (41) [2024-11-28 04:18:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2024-11-28 04:18:20,927 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 52 [2024-11-28 04:18:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:20,928 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2024-11-28 04:18:20,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:18:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2024-11-28 04:18:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:18:20,930 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:20,930 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:20,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:21,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:21,131 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:21,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -53166218, now seen corresponding path program 1 times [2024-11-28 04:18:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:21,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473149110] [2024-11-28 04:18:21,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:18:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008253153] [2024-11-28 04:18:21,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:18:21,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:21,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:21,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:18:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:21,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-28 04:18:21,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:21,411 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 [2024-11-28 04:18:21,419 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 11 [2024-11-28 04:18:21,428 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 [2024-11-28 04:18:21,879 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 29 treesize of output 17 [2024-11-28 04:18:21,889 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 [2024-11-28 04:18:21,972 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 21 treesize of output 13 [2024-11-28 04:18:21,976 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 17 treesize of output 9 [2024-11-28 04:18:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:18:22,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-28 04:18:22,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473149110] [2024-11-28 04:18:22,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008253153] [2024-11-28 04:18:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008253153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:22,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:18:22,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-28 04:18:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746971252] [2024-11-28 04:18:22,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:22,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:18:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:22,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:18:22,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:18:22,393 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 04:18:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:23,441 INFO L93 Difference]: Finished difference Result 197 states and 240 transitions. [2024-11-28 04:18:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:18:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 55 [2024-11-28 04:18:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:23,446 INFO L225 Difference]: With dead ends: 197 [2024-11-28 04:18:23,446 INFO L226 Difference]: Without dead ends: 195 [2024-11-28 04:18:23,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:18:23,451 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:23,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 295 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:18:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-28 04:18:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2024-11-28 04:18:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 125 states have internal predecessors, (128), 41 states have call successors, (41), 21 states have call predecessors, (41), 29 states have return successors, (62), 43 states have call predecessors, (62), 39 states have call successors, (62) [2024-11-28 04:18:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 231 transitions. [2024-11-28 04:18:23,521 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 231 transitions. Word has length 55 [2024-11-28 04:18:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:23,521 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 231 transitions. [2024-11-28 04:18:23,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 04:18:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 231 transitions. [2024-11-28 04:18:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 04:18:23,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:23,525 INFO L218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:23,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:18:23,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:18:23,726 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:23,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash 658666501, now seen corresponding path program 2 times [2024-11-28 04:18:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:23,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550178692] [2024-11-28 04:18:23,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:23,792 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:23,793 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:18:23,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201507743] [2024-11-28 04:18:23,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:23,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:23,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:23,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:18:24,039 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:24,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:24,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-28 04:18:24,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:24,068 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 [2024-11-28 04:18:24,075 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 [2024-11-28 04:18:24,146 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 [2024-11-28 04:18:24,156 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 11 [2024-11-28 04:18:24,705 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 11 [2024-11-28 04:18:24,747 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 [2024-11-28 04:18:24,840 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 11 treesize of output 7 [2024-11-28 04:18:46,237 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-28 04:18:46,238 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 25 [2024-11-28 04:18:46,265 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 50 treesize of output 38 [2024-11-28 04:18:46,315 INFO L349 Elim1Store]: treesize reduction 18, result has 52.6 percent of original size [2024-11-28 04:18:46,315 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 83 treesize of output 72 [2024-11-28 04:18:47,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:18:47,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2024-11-28 04:18:47,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:18:47,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 79 [2024-11-28 04:18:47,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:18:47,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 79 [2024-11-28 04:18:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:18:48,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550178692] [2024-11-28 04:18:54,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:18:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201507743] [2024-11-28 04:18:54,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201507743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:54,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:18:54,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 04:18:54,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659727459] [2024-11-28 04:18:54,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:54,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:18:54,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:54,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:18:54,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1053, Unknown=6, NotChecked=0, Total=1190 [2024-11-28 04:18:54,297 INFO L87 Difference]: Start difference. First operand 189 states and 231 transitions. Second operand has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:18:58,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:19:02,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:19:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:23,056 INFO L93 Difference]: Finished difference Result 319 states and 370 transitions. [2024-11-28 04:19:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:19:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2024-11-28 04:19:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:23,061 INFO L225 Difference]: With dead ends: 319 [2024-11-28 04:19:23,062 INFO L226 Difference]: Without dead ends: 317 [2024-11-28 04:19:23,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=252, Invalid=2090, Unknown=10, NotChecked=0, Total=2352 [2024-11-28 04:19:23,067 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:23,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 332 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 924 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2024-11-28 04:19:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-11-28 04:19:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2024-11-28 04:19:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 198 states have (on average 1.0858585858585859) internal successors, (215), 208 states have internal predecessors, (215), 59 states have call successors, (59), 40 states have call predecessors, (59), 52 states have return successors, (89), 62 states have call predecessors, (89), 56 states have call successors, (89) [2024-11-28 04:19:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 363 transitions. [2024-11-28 04:19:23,193 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 363 transitions. Word has length 58 [2024-11-28 04:19:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:23,195 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 363 transitions. [2024-11-28 04:19:23,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 7 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:19:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 363 transitions. [2024-11-28 04:19:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:19:23,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:23,200 INFO L218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:23,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:19:23,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:23,404 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:23,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1483807187, now seen corresponding path program 1 times [2024-11-28 04:19:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:23,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553347278] [2024-11-28 04:19:23,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:19:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641503310] [2024-11-28 04:19:23,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:23,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:23,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:23,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:19:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:23,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-28 04:19:23,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:23,767 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 [2024-11-28 04:19:23,771 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 [2024-11-28 04:19:23,781 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 [2024-11-28 04:19:23,791 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 [2024-11-28 04:19:23,804 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 [2024-11-28 04:19:23,833 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 11 treesize of output 7 [2024-11-28 04:19:24,384 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 [2024-11-28 04:19:25,311 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 [2024-11-28 04:19:38,254 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 [2024-11-28 04:19:38,334 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-11-28 04:19:38,334 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 57 treesize of output 62 [2024-11-28 04:19:38,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:19:38,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 98 [2024-11-28 04:19:38,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:19:38,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 131 [2024-11-28 04:19:38,645 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 103 treesize of output 79 [2024-11-28 04:19:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 04:19:38,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:41,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553347278] [2024-11-28 04:19:41,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:19:41,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641503310] [2024-11-28 04:19:41,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641503310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:41,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:19:41,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-11-28 04:19:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501508467] [2024-11-28 04:19:41,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:41,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:19:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:41,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:19:41,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=836, Unknown=3, NotChecked=0, Total=930 [2024-11-28 04:19:41,346 INFO L87 Difference]: Start difference. First operand 310 states and 363 transitions. Second operand has 28 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 04:19:45,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:19:49,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:19:53,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:19:57,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:01,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:05,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:11,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:15,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:21,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:25,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:29,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:31,431 INFO L93 Difference]: Finished difference Result 420 states and 501 transitions. [2024-11-28 04:20:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 04:20:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 70 [2024-11-28 04:20:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:31,438 INFO L225 Difference]: With dead ends: 420 [2024-11-28 04:20:31,438 INFO L226 Difference]: Without dead ends: 408 [2024-11-28 04:20:31,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=413, Invalid=3364, Unknown=5, NotChecked=0, Total=3782 [2024-11-28 04:20:31,482 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 73 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:31,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 195 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1533 Invalid, 36 Unknown, 0 Unchecked, 47.4s Time] [2024-11-28 04:20:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-28 04:20:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 397. [2024-11-28 04:20:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 253 states have (on average 1.0869565217391304) internal successors, (275), 265 states have internal predecessors, (275), 76 states have call successors, (76), 51 states have call predecessors, (76), 67 states have return successors, (119), 80 states have call predecessors, (119), 73 states have call successors, (119) [2024-11-28 04:20:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 470 transitions. [2024-11-28 04:20:31,608 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 470 transitions. Word has length 70 [2024-11-28 04:20:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:31,609 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 470 transitions. [2024-11-28 04:20:31,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 04:20:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 470 transitions. [2024-11-28 04:20:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:20:31,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:31,610 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:31,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:31,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 04:20:31,815 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:31,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:31,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1785355386, now seen corresponding path program 2 times [2024-11-28 04:20:31,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:31,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119654103] [2024-11-28 04:20:31,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:31,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:31,862 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:31,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:20:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12967363] [2024-11-28 04:20:31,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:31,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:31,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:20:32,080 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:32,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:32,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-28 04:20:32,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:32,124 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 [2024-11-28 04:20:32,179 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 [2024-11-28 04:20:32,348 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 11 [2024-11-28 04:20:32,359 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 [2024-11-28 04:20:33,231 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 [2024-11-28 04:20:33,240 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 29 treesize of output 17 [2024-11-28 04:20:33,898 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 21 treesize of output 13 [2024-11-28 04:20:33,966 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 21 treesize of output 13 [2024-11-28 04:20:33,969 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 24 treesize of output 12 [2024-11-28 04:20:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 56 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 04:20:34,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119654103] [2024-11-28 04:20:34,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:20:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12967363] [2024-11-28 04:20:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12967363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:34,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:20:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 04:20:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639688821] [2024-11-28 04:20:34,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:34,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:20:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:34,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:20:34,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:20:34,367 INFO L87 Difference]: Start difference. First operand 397 states and 470 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 04:20:38,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:40,791 INFO L93 Difference]: Finished difference Result 505 states and 594 transitions. [2024-11-28 04:20:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:20:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2024-11-28 04:20:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:40,795 INFO L225 Difference]: With dead ends: 505 [2024-11-28 04:20:40,796 INFO L226 Difference]: Without dead ends: 503 [2024-11-28 04:20:40,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:20:40,797 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:40,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 328 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-11-28 04:20:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-11-28 04:20:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 495. [2024-11-28 04:20:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 319 states have (on average 1.084639498432602) internal successors, (346), 335 states have internal predecessors, (346), 88 states have call successors, (88), 69 states have call predecessors, (88), 87 states have return successors, (149), 90 states have call predecessors, (149), 83 states have call successors, (149) [2024-11-28 04:20:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 583 transitions. [2024-11-28 04:20:40,969 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 583 transitions. Word has length 74 [2024-11-28 04:20:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:40,969 INFO L471 AbstractCegarLoop]: Abstraction has 495 states and 583 transitions. [2024-11-28 04:20:40,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 04:20:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 583 transitions. [2024-11-28 04:20:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:20:40,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:40,970 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:40,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:20:41,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:41,171 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:41,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -883491476, now seen corresponding path program 3 times [2024-11-28 04:20:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903937785] [2024-11-28 04:20:41,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:20:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:41,228 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:20:41,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-28 04:20:42,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:42,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903937785] [2024-11-28 04:20:42,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903937785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:20:42,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:20:42,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:20:42,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508160218] [2024-11-28 04:20:42,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:20:42,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:20:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:42,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:20:42,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:20:42,942 INFO L87 Difference]: Start difference. First operand 495 states and 583 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:20:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:43,809 INFO L93 Difference]: Finished difference Result 522 states and 616 transitions. [2024-11-28 04:20:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:20:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 74 [2024-11-28 04:20:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:43,813 INFO L225 Difference]: With dead ends: 522 [2024-11-28 04:20:43,813 INFO L226 Difference]: Without dead ends: 261 [2024-11-28 04:20:43,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:20:43,816 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:43,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 145 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:20:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-28 04:20:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-11-28 04:20:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 170 states have (on average 1.0705882352941176) internal successors, (182), 177 states have internal predecessors, (182), 45 states have call successors, (45), 37 states have call predecessors, (45), 45 states have return successors, (63), 46 states have call predecessors, (63), 42 states have call successors, (63) [2024-11-28 04:20:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 290 transitions. [2024-11-28 04:20:43,885 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 290 transitions. Word has length 74 [2024-11-28 04:20:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:43,885 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 290 transitions. [2024-11-28 04:20:43,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:20:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 290 transitions. [2024-11-28 04:20:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 04:20:43,886 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:43,886 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:43,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 04:20:43,887 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:43,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1765411593, now seen corresponding path program 1 times [2024-11-28 04:20:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:43,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223347726] [2024-11-28 04:20:43,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:20:43,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679347821] [2024-11-28 04:20:43,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:20:43,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:43,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:43,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:20:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:44,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-28 04:20:44,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:44,215 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 [2024-11-28 04:20:44,221 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 11 [2024-11-28 04:20:44,229 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 [2024-11-28 04:20:44,256 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 11 treesize of output 7 [2024-11-28 04:20:44,626 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 29 treesize of output 17 [2024-11-28 04:20:44,634 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 [2024-11-28 04:20:44,724 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 21 treesize of output 13 [2024-11-28 04:20:44,729 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 17 treesize of output 9 [2024-11-28 04:20:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-28 04:20:44,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223347726] [2024-11-28 04:20:45,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:20:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679347821] [2024-11-28 04:20:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679347821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:45,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:20:45,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-28 04:20:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688750687] [2024-11-28 04:20:45,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:45,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:20:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:45,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:20:45,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:20:45,398 INFO L87 Difference]: Start difference. First operand 261 states and 290 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:20:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:46,263 INFO L93 Difference]: Finished difference Result 269 states and 299 transitions. [2024-11-28 04:20:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:20:46,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 82 [2024-11-28 04:20:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:46,266 INFO L225 Difference]: With dead ends: 269 [2024-11-28 04:20:46,266 INFO L226 Difference]: Without dead ends: 267 [2024-11-28 04:20:46,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:20:46,269 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:46,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 190 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:20:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-28 04:20:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-11-28 04:20:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 173 states have (on average 1.069364161849711) internal successors, (185), 180 states have internal predecessors, (185), 45 states have call successors, (45), 38 states have call predecessors, (45), 46 states have return successors, (63), 46 states have call predecessors, (63), 42 states have call successors, (63) [2024-11-28 04:20:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2024-11-28 04:20:46,347 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 82 [2024-11-28 04:20:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:46,349 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2024-11-28 04:20:46,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:20:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2024-11-28 04:20:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-28 04:20:46,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:46,350 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:46,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:46,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:46,555 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:20:46,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1347637204, now seen corresponding path program 2 times [2024-11-28 04:20:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564015505] [2024-11-28 04:20:46,556 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:46,621 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:46,621 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:20:46,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813229025] [2024-11-28 04:20:46,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:46,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:46,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:46,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:20:46,929 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:46,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:46,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-28 04:20:46,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:46,948 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 [2024-11-28 04:20:46,952 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 [2024-11-28 04:20:46,957 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 11 [2024-11-28 04:20:46,965 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 [2024-11-28 04:20:47,171 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 [2024-11-28 04:20:47,180 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 11 [2024-11-28 04:20:47,225 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 11 treesize of output 7 [2024-11-28 04:20:49,211 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 29 treesize of output 17 [2024-11-28 04:20:49,234 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 [2024-11-28 04:20:49,379 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 52 treesize of output 40 [2024-11-28 04:20:49,594 INFO L349 Elim1Store]: treesize reduction 108, result has 43.2 percent of original size [2024-11-28 04:20:49,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 132 [2024-11-28 04:20:49,854 INFO L349 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2024-11-28 04:20:49,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2024-11-28 04:21:19,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:21:19,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 279 treesize of output 639 [2024-11-28 04:21:19,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:21:19,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 387 treesize of output 715 [2024-11-28 04:21:20,026 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 233 treesize of output 181 [2024-11-28 04:21:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 24 proven. 71 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 04:21:29,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:30,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:30,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564015505] [2024-11-28 04:21:30,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:21:30,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813229025] [2024-11-28 04:21:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813229025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:30,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:21:30,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-28 04:21:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641591590] [2024-11-28 04:21:30,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:30,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:21:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:30,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:21:30,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:21:30,822 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 25 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 04:21:33,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:21:38,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:21:42,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:21:44,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:21:48,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:21:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:59,064 INFO L93 Difference]: Finished difference Result 389 states and 430 transitions. [2024-11-28 04:21:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:21:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 88 [2024-11-28 04:21:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:59,074 INFO L225 Difference]: With dead ends: 389 [2024-11-28 04:21:59,074 INFO L226 Difference]: Without dead ends: 387 [2024-11-28 04:21:59,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 04:21:59,076 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:59,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 285 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2024-11-28 04:21:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-28 04:21:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 379. [2024-11-28 04:21:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 247 states have (on average 1.0769230769230769) internal successors, (266), 258 states have internal predecessors, (266), 64 states have call successors, (64), 55 states have call predecessors, (64), 67 states have return successors, (92), 65 states have call predecessors, (92), 60 states have call successors, (92) [2024-11-28 04:21:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 422 transitions. [2024-11-28 04:21:59,600 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 422 transitions. Word has length 88 [2024-11-28 04:21:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:59,600 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 422 transitions. [2024-11-28 04:21:59,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 04:21:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 422 transitions. [2024-11-28 04:21:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 04:21:59,601 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:59,602 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:59,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:21:59,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:59,802 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:21:59,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -421846637, now seen corresponding path program 3 times [2024-11-28 04:21:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:59,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721252015] [2024-11-28 04:21:59,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:21:59,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:59,946 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 04:21:59,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:21:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630419563] [2024-11-28 04:21:59,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:21:59,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:59,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:59,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:22:00,237 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:22:00,237 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:00,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 04:22:00,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:25,752 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 25 treesize of output 17 [2024-11-28 04:22:27,465 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 27 treesize of output 19 [2024-11-28 04:22:27,469 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 [2024-11-28 04:22:27,472 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 [2024-11-28 04:22:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 152 proven. 11 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-28 04:22:27,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:33,564 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 35 treesize of output 27 [2024-11-28 04:22:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 71 proven. 7 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-28 04:22:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721252015] [2024-11-28 04:22:42,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:22:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630419563] [2024-11-28 04:22:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630419563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:42,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:22:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2024-11-28 04:22:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386411815] [2024-11-28 04:22:42,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:42,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:22:42,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:42,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:22:42,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=347, Unknown=6, NotChecked=0, Total=420 [2024-11-28 04:22:42,699 INFO L87 Difference]: Start difference. First operand 379 states and 422 transitions. Second operand has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 04:22:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:44,035 INFO L93 Difference]: Finished difference Result 389 states and 431 transitions. [2024-11-28 04:22:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:22:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 102 [2024-11-28 04:22:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:44,038 INFO L225 Difference]: With dead ends: 389 [2024-11-28 04:22:44,038 INFO L226 Difference]: Without dead ends: 387 [2024-11-28 04:22:44,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=120, Invalid=576, Unknown=6, NotChecked=0, Total=702 [2024-11-28 04:22:44,039 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 35 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:44,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 196 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:22:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-28 04:22:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 372. [2024-11-28 04:22:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 244 states have (on average 1.0737704918032787) internal successors, (262), 252 states have internal predecessors, (262), 61 states have call successors, (61), 54 states have call predecessors, (61), 66 states have return successors, (89), 65 states have call predecessors, (89), 57 states have call successors, (89) [2024-11-28 04:22:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 412 transitions. [2024-11-28 04:22:44,516 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 412 transitions. Word has length 102 [2024-11-28 04:22:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:44,517 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 412 transitions. [2024-11-28 04:22:44,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-28 04:22:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 412 transitions. [2024-11-28 04:22:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 04:22:44,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:44,518 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:44,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:22:44,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:22:44,719 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:22:44,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1655221382, now seen corresponding path program 1 times [2024-11-28 04:22:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:44,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209865940] [2024-11-28 04:22:44,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:22:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:22:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582940857] [2024-11-28 04:22:44,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:22:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:44,799 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:44,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:22:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:45,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-28 04:22:45,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:45,128 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 [2024-11-28 04:22:45,131 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 [2024-11-28 04:22:45,171 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 11 [2024-11-28 04:22:45,180 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 [2024-11-28 04:22:45,217 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 11 treesize of output 7 [2024-11-28 04:22:45,770 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 11 [2024-11-28 04:22:45,819 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 [2024-11-28 04:22:45,940 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 11 treesize of output 7 [2024-11-28 04:23:03,610 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 13 treesize of output 9 [2024-11-28 04:23:08,070 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 42 treesize of output 26 [2024-11-28 04:23:08,133 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 36 treesize of output 13 [2024-11-28 04:23:08,410 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 25 treesize of output 17 [2024-11-28 04:23:16,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:23:16,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2024-11-28 04:23:16,878 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 13 treesize of output 9 [2024-11-28 04:23:26,461 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 37 treesize of output 29 [2024-11-28 04:23:35,258 INFO L349 Elim1Store]: treesize reduction 24, result has 53.8 percent of original size [2024-11-28 04:23:35,258 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 59 treesize of output 66 [2024-11-28 04:23:35,363 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 23 treesize of output 3 [2024-11-28 04:23:39,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:23:39,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 211 [2024-11-28 04:23:39,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:23:39,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 97 [2024-11-28 04:23:39,949 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 69 treesize of output 49 [2024-11-28 04:23:39,976 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 26 treesize of output 14 [2024-11-28 04:23:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 81 proven. 87 refuted. 18 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-28 04:23:40,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:23:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:23:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209865940] [2024-11-28 04:23:45,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:23:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582940857] [2024-11-28 04:23:45,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582940857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:23:45,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:23:45,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2024-11-28 04:23:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21516085] [2024-11-28 04:23:45,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:23:45,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:23:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:23:45,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:23:45,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1112, Unknown=12, NotChecked=0, Total=1260 [2024-11-28 04:23:45,090 INFO L87 Difference]: Start difference. First operand 372 states and 412 transitions. Second operand has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 11 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 04:23:49,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:23:53,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:23:57,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:01,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:06,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:24:12,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:20,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:25,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:29,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:34,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:38,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:42,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:46,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:50,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:24:54,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:03,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:07,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:11,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:20,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:25:25,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:25:30,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:34,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:25:38,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:25:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:25:38,240 INFO L93 Difference]: Finished difference Result 390 states and 430 transitions. [2024-11-28 04:25:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:25:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 11 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 100 [2024-11-28 04:25:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:25:38,271 INFO L225 Difference]: With dead ends: 390 [2024-11-28 04:25:38,271 INFO L226 Difference]: Without dead ends: 378 [2024-11-28 04:25:38,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=343, Invalid=2946, Unknown=17, NotChecked=0, Total=3306 [2024-11-28 04:25:38,273 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 50 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:25:38,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1144 Invalid, 36 Unknown, 0 Unchecked, 97.6s Time] [2024-11-28 04:25:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-28 04:25:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 286. [2024-11-28 04:25:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 189 states have (on average 1.0687830687830688) internal successors, (202), 193 states have internal predecessors, (202), 46 states have call successors, (46), 42 states have call predecessors, (46), 50 states have return successors, (70), 50 states have call predecessors, (70), 43 states have call successors, (70) [2024-11-28 04:25:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 318 transitions. [2024-11-28 04:25:38,800 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 318 transitions. Word has length 100 [2024-11-28 04:25:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:25:38,801 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 318 transitions. [2024-11-28 04:25:38,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 11 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 04:25:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 318 transitions. [2024-11-28 04:25:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 04:25:38,802 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:25:38,802 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:25:38,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:25:39,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:25:39,007 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:25:39,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:25:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1504316307, now seen corresponding path program 3 times [2024-11-28 04:25:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:25:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055465479] [2024-11-28 04:25:39,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:25:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:25:39,099 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:25:39,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:25:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904267620] [2024-11-28 04:25:39,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:25:39,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:39,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:39,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:25:39,441 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:25:39,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:39,445 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-11-28 04:25:39,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:25:39,472 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 [2024-11-28 04:25:39,479 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 [2024-11-28 04:25:39,566 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 11 [2024-11-28 04:25:39,590 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 [2024-11-28 04:25:40,977 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 23 treesize of output 15 [2024-11-28 04:25:40,992 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 35 treesize of output 21 [2024-11-28 04:25:41,247 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 25 treesize of output 17 [2024-11-28 04:26:15,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:26:15,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-11-28 04:26:40,461 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 31 treesize of output 23 [2024-11-28 04:26:40,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:26:40,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-28 04:26:40,481 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 [2024-11-28 04:26:40,485 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 [2024-11-28 04:26:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 1 proven. 160 refuted. 1 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-28 04:26:40,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:41,739 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 59 treesize of output 51 [2024-11-28 04:26:41,743 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 [2024-11-28 04:26:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-28 04:26:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055465479] [2024-11-28 04:26:42,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:26:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904267620] [2024-11-28 04:26:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904267620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:42,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:26:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 34 [2024-11-28 04:26:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532143047] [2024-11-28 04:26:42,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:42,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:26:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:42,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:26:42,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=995, Unknown=12, NotChecked=0, Total=1122 [2024-11-28 04:26:42,119 INFO L87 Difference]: Start difference. First operand 286 states and 318 transitions. Second operand has 34 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 16 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-28 04:26:46,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:27:14,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:27:18,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:27:20,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:27:24,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:27:26,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:27:40,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:27:51,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:27:54,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:27:58,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:28:02,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:28:06,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:28:08,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:28:13,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:28:17,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:28:42,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:29:03,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:07,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:08,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:29:12,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:17,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:29:58,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:02,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:30:06,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-11-28 04:30:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:08,684 INFO L93 Difference]: Finished difference Result 414 states and 461 transitions. [2024-11-28 04:30:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-28 04:30:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 16 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 104 [2024-11-28 04:30:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:08,687 INFO L225 Difference]: With dead ends: 414 [2024-11-28 04:30:08,687 INFO L226 Difference]: Without dead ends: 412 [2024-11-28 04:30:08,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 173.3s TimeCoverageRelationStatistics Valid=521, Invalid=4846, Unknown=35, NotChecked=0, Total=5402 [2024-11-28 04:30:08,689 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 108 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:08,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 284 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 853 Invalid, 16 Unknown, 0 Unchecked, 92.6s Time] [2024-11-28 04:30:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-28 04:30:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 401. [2024-11-28 04:30:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 264 states have (on average 1.0606060606060606) internal successors, (280), 271 states have internal predecessors, (280), 64 states have call successors, (64), 59 states have call predecessors, (64), 72 states have return successors, (99), 70 states have call predecessors, (99), 60 states have call successors, (99) [2024-11-28 04:30:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 443 transitions. [2024-11-28 04:30:09,476 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 443 transitions. Word has length 104 [2024-11-28 04:30:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:09,477 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 443 transitions. [2024-11-28 04:30:09,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 16 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-28 04:30:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 443 transitions. [2024-11-28 04:30:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 04:30:09,478 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:09,478 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:09,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:09,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:09,679 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:09,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -425407778, now seen corresponding path program 4 times [2024-11-28 04:30:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:09,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617903228] [2024-11-28 04:30:09,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:30:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:09,762 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:30:09,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:30:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233326216] [2024-11-28 04:30:09,764 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:30:09,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:09,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:09,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:09,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:30:10,142 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:30:10,142 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:10,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-11-28 04:30:10,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:10,181 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 [2024-11-28 04:30:10,210 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 11 [2024-11-28 04:30:10,309 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 11 treesize of output 7 [2024-11-28 04:30:15,860 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26| Int) (|func_to_recursive_line_41_to_52_0_#t~mem5| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2|) |func_to_recursive_line_41_to_52_0_#t~mem5|))) is different from true [2024-11-28 04:30:32,919 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_27| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_3| Int) (|func_to_recursive_line_41_to_52_0_#t~mem5| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_27| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_27|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_27|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_3|) |func_to_recursive_line_41_to_52_0_#t~mem5|))) (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_41_to_52_0_#t~mem5_66| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26| Int)) (= (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#t~mem5_66|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26|)))) is different from true [2024-11-28 04:30:41,786 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_4| Int) (|func_to_recursive_line_41_to_52_0_#t~mem5| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_28|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_28|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_4|) |func_to_recursive_line_41_to_52_0_#t~mem5|))) (exists ((|v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_41_to_52_0_#t~mem5_67| Int) (|v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26| Int)) (= (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_52_0_#in~y.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#in~y.offset_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_52_0_#t~mem5_67|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_26|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_26|)))) is different from true [2024-11-28 04:30:46,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:30:46,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2024-11-28 04:30:52,360 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_22| Int) (|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_31| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_31| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_31|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_31|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_22|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_22|) |func_to_recursive_line_41_to_52_0_#t~mem4|))) is different from true [2024-11-28 04:31:01,267 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_22| Int) (|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_31| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_31| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_31|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_31|) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_22|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_22|) |func_to_recursive_line_41_to_52_0_#t~mem4|))) (exists ((|v_func_to_recursive_line_41_to_52_0_#t~mem4_66| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_32| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_32| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_23| Int)) (= (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_23|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_23|) |v_func_to_recursive_line_41_to_52_0_#t~mem4_66|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_32|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_32|)))) is different from true [2024-11-28 04:31:06,630 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_33| Int) (|func_to_recursive_line_41_to_52_0_#t~mem4| Int) (|v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_33| Int) (|v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_24| Int)) (= (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_52_0_#in~a.base_BEFORE_CALL_24|) |v_func_to_recursive_line_41_to_52_0_#in~a.offset_BEFORE_CALL_24|) |func_to_recursive_line_41_to_52_0_#t~mem4|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_41_to_52_0_#in~b.base_BEFORE_CALL_33|) |v_func_to_recursive_line_41_to_52_0_#in~b.offset_BEFORE_CALL_33|))) is different from true [2024-11-28 04:31:31,949 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2024-11-28 04:31:31,950 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 87 treesize of output 102 [2024-11-28 04:31:32,717 INFO L349 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2024-11-28 04:31:32,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 145 treesize of output 163 [2024-11-28 04:31:36,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:31:36,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 231 [2024-11-28 04:31:36,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:31:36,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 151 [2024-11-28 04:31:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 107 proven. 57 refuted. 9 times theorem prover too weak. 30 trivial. 174 not checked. [2024-11-28 04:31:39,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:56,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617903228] [2024-11-28 04:31:56,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:31:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233326216] [2024-11-28 04:31:56,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233326216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:56,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:31:56,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-11-28 04:31:56,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965539765] [2024-11-28 04:31:56,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:56,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:31:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:56,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:31:56,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1048, Unknown=15, NotChecked=426, Total=1640 [2024-11-28 04:31:56,252 INFO L87 Difference]: Start difference. First operand 401 states and 443 transitions. Second operand has 36 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 31 states have internal predecessors, (64), 16 states have call successors, (19), 11 states have call predecessors, (19), 12 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) [2024-11-28 04:32:08,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:32:13,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:32:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:26,645 INFO L93 Difference]: Finished difference Result 437 states and 500 transitions. [2024-11-28 04:32:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:32:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 31 states have internal predecessors, (64), 16 states have call successors, (19), 11 states have call predecessors, (19), 12 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) Word has length 112 [2024-11-28 04:32:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:26,650 INFO L225 Difference]: With dead ends: 437 [2024-11-28 04:32:26,650 INFO L226 Difference]: Without dead ends: 435 [2024-11-28 04:32:26,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 51 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 96.7s TimeCoverageRelationStatistics Valid=275, Invalid=1896, Unknown=15, NotChecked=570, Total=2756 [2024-11-28 04:32:26,652 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 65 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:26,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 242 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 917 Invalid, 5 Unknown, 456 Unchecked, 17.9s Time] [2024-11-28 04:32:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2024-11-28 04:32:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 429. [2024-11-28 04:32:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 281 states have (on average 1.0569395017793595) internal successors, (297), 288 states have internal predecessors, (297), 68 states have call successors, (68), 63 states have call predecessors, (68), 79 states have return successors, (124), 77 states have call predecessors, (124), 64 states have call successors, (124) [2024-11-28 04:32:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 489 transitions. [2024-11-28 04:32:27,868 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 489 transitions. Word has length 112 [2024-11-28 04:32:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:27,868 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 489 transitions. [2024-11-28 04:32:27,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 31 states have internal predecessors, (64), 16 states have call successors, (19), 11 states have call predecessors, (19), 12 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) [2024-11-28 04:32:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 489 transitions. [2024-11-28 04:32:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-28 04:32:27,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:27,870 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:27,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:32:28,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:28,075 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:28,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:28,075 INFO L85 PathProgramCache]: Analyzing trace with hash -889339579, now seen corresponding path program 5 times [2024-11-28 04:32:28,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:28,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129772392] [2024-11-28 04:32:28,075 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:32:28,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:28,235 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 04:32:28,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:32:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032700335] [2024-11-28 04:32:28,241 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:32:28,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:28,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764c3c68-abc4-4778-a93c-862565835103/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:32:30,284 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 04:32:30,284 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:30,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-11-28 04:32:30,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:30,311 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 [2024-11-28 04:32:33,515 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 [2024-11-28 04:32:33,570 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 17 treesize of output 9